As perryoakridge hasn't visited this forum since August of last year, I'll update his list. I have not (yet) waded through his 994 CLT entries to see if any new credits have surfaced - I'm just adding the titles that have been confirmed since the list was last updated.

Bart Mixon  (21)
• 31 (2016 film) - confirmed by bigdaddyhorse
• Captain Marvel - confirmed by Gamemaster
• The Curse of the Screaming Dead aka Curse of the Cannibal Confederates - confirmed by AiAustria
• Cyborg (1989) - confirmed by ateo357
• A Dog's Journey - confirmed by huskersports
• Fear the Walking Dead: The Complete First Season, Episode 6 (2015 TV series) - confirmed by ateo357
• Garden of Evil - confirmed by bigdaddyhorse
• Guardians of the Galaxy Vol. 2 - confirmed by ateo357
• Hellboy (2004) - confirmed by ateo357
• Hellboy II: The Golden Army (2008) - confirmed by Gamemaster & bigdaddyhorse
• How the Grinch Stole Christmas (2000) - confirmed by Gamemaster
• The Iceman - confirmed by ateo357
• Jackass: The Movie (2002) - confirmed by ateo357
• Men in Black (1997) - confirmed by ateo357 and bigdaddyhorse
• Never Sleep Again: The Elm Street Legacy (2010 documentary) - confirmed by Merrik
• A Nightmare on Elm Street (2010 film) - confirmed by ateo357
• The Texas Chainsaw Massacre 2 (1986) - confirmed by ateo357
• The Outing - confirmed by ateo357
• Peppermint - confirmed by Gamemaster
• Pet Sematary II (1992) - confirmed by ateo357 & bigdaddyhorse
• Progeny (1998) - confirmed by ateo357

Bart J. Mixon  (23)
• Avengers: Infinity War - confirmed by Kluge
• Captain America: Civil War (2016) - confirmed by me
• Carnival of Souls (1998) - confirmed by bigdaddyhorse
• Fantastic Four: Rise of the Silver Surfer (2007) - confirmed by Kluge
• Freaks of Nature (2015) - confirmed by ateo357
• Fright Night Part 2 - confirmed by bigdaddyhorse
• G.I. Joe: The Rise of Cobra (2009) - confirmed by Gamemaster and ateo357
• G.I. Joe: Retaliation (2013) - confirmed by ateo357
• Gangster Squad (2013) - confirmed by ateo357
• House of 1000 Corpses (2003) - confirmed by bigdaddyhorse
• Insidious: Chapter 3 (2015) - confirmed by ateo357
• It (1990 TV Mini-series) - confirmed by ateo357 & bigdaddyhorse
• Jackass Presents: Bad Grandpa (2013) - confirmed by Gamemaster
• Necronomicon: Book of the Dead (1993) - confirmed by bigdaddyhorse
• Norbit - confirmed by ateo357
• The Presence aka The Island aka Danger Island (1992 TV movie) - confirmed by ateo357
• Raze (2013) - confirmed by ateo357
• Rings (2017 film) - confirmed by ateo357 & Gamemaster
• Rushmore (1998) - confirmed by ateo357
• Same Kind of Different As Me - confirmed by huskersports
• Scalps (1983 film) - confirmed by zwoti
• Witch Academy (1995) - confirmed by bigdaddyhorse
• X-Men: The Last Stand (2006) - confirmed by Gamemaster / Merrik / ateo357

Invalid  (13)
• The Beast (1996 TV Mini-series) (credited as Creature Effects - not allowed) - confirmed by Merrik
• Big Momma's House 2 (2006) (no credit given) - confirmed by Gamemaster
• The Cat in the Hat (2003 film) (credited as Project Coordinator - not allowed) - confirmed by Gamemaster
• Fantastic Four (2005) (no credit given) - confirmed by Gamemaster
• K2 (1991 film) (no credit given) - confirmed by ateo357
• Land of the Lost (2009 film) (no credit given) - confirmed by AiAustria
• Magic in the Water (1995) (credited as Creature Effects Supervision - not allowed) - confirmed by AiAustria
• Men in Black II (2002) (credited as Project Supervisor - not allowed) - confirmed by Gamemaster
• A Nightmare on Elm Street 2: Freddy's Revenge (1985) (credited as Assistant - not allowed) - confirmed by ateo357
• A Nightmare on Elm Street 4: The Dream Master (1988) (credited as Technician - not allowed) - confirmed by ateo357
• Oz the Great and Powerful (2013) (no credit given) - confirmed by Gamemaster
• Star Trek (2009 film) (no credit given) - confirmed by me
• Star Trek Into Darkness (2013 film) (no credit given) - confirmed by me

So it still looks like Bart J. Mixon, although the numbers are getting closer together than they were before...

There's a new, as of yet unconfirmed title in the CLT, 'You're So Cool, Brewster!: The Story of Fright Night':

Bart Mixon  (22 titles, 21 confirmed)
• 31 (2016 film) - confirmed by bigdaddyhorse
• Captain Marvel - confirmed by Gamemaster
• The Curse of the Screaming Dead aka Curse of the Cannibal Confederates - confirmed by AiAustria
• Cyborg (1989) - confirmed by ateo357
• A Dog's Journey - confirmed by huskersports
• Fear the Walking Dead: The Complete First Season, Episode 6 (2015 TV series) - confirmed by ateo357
• Garden of Evil - confirmed by bigdaddyhorse
• Guardians of the Galaxy Vol. 2 - confirmed by ateo357
• Hellboy (2004) - confirmed by ateo357
• Hellboy II: The Golden Army (2008) - confirmed by Gamemaster & bigdaddyhorse
• How the Grinch Stole Christmas (2000) - confirmed by Gamemaster
• The Iceman - confirmed by ateo357
• Jackass: The Movie (2002) - confirmed by ateo357
• Men in Black (1997) - confirmed by ateo357 and bigdaddyhorse
• Never Sleep Again: The Elm Street Legacy (2010 documentary) - confirmed by Merrik
• A Nightmare on Elm Street (2010 film) - confirmed by ateo357
• The Texas Chainsaw Massacre 2 (1986) - confirmed by ateo357
• The Outing - confirmed by ateo357
• Peppermint - confirmed by Gamemaster
• Pet Sematary II (1992) - confirmed by ateo357 & bigdaddyhorse
• Progeny (1998) - confirmed by ateo357
• You're So Cool, Brewster!: The Story of Fright Night

Bart J. Mixon  (23 titles, 23 confirmed)
• Avengers: Infinity War - confirmed by Kluge
• Captain America: Civil War (2016) - confirmed by me
• Carnival of Souls (1998) - confirmed by bigdaddyhorse
• Fantastic Four: Rise of the Silver Surfer (2007) - confirmed by Kluge
• Freaks of Nature (2015) - confirmed by ateo357
• Fright Night Part 2 - confirmed by bigdaddyhorse
• G.I. Joe: The Rise of Cobra (2009) - confirmed by Gamemaster and ateo357
• G.I. Joe: Retaliation (2013) - confirmed by ateo357
• Gangster Squad (2013) - confirmed by ateo357
• House of 1000 Corpses (2003) - confirmed by bigdaddyhorse
• Insidious: Chapter 3 (2015) - confirmed by ateo357
• It (1990 TV Mini-series) - confirmed by ateo357 & bigdaddyhorse
• Jackass Presents: Bad Grandpa (2013) - confirmed by Gamemaster
• Necronomicon: Book of the Dead (1993) - confirmed by bigdaddyhorse
• Norbit - confirmed by ateo357
• The Presence aka The Island aka Danger Island (1992 TV movie) - confirmed by ateo357
• Raze (2013) - confirmed by ateo357
• Rings (2017 film) - confirmed by ateo357 & Gamemaster
• Rushmore (1998) - confirmed by ateo357
• Same Kind of Different As Me - confirmed by huskersports
• Scalps (1983 film) - confirmed by zwoti
• Witch Academy (1995) - confirmed by bigdaddyhorse
• X-Men: The Last Stand (2006) - confirmed by Gamemaster / Merrik / ateo357

Invalid  (13)
• The Beast (1996 TV Mini-series) (credited as Creature Effects - not allowed) - confirmed by Merrik
• Big Momma's House 2 (2006) (no credit given) - confirmed by Gamemaster
• The Cat in the Hat (2003 film) (credited as Project Coordinator - not allowed) - confirmed by Gamemaster
• Fantastic Four (2005) (no credit given) - confirmed by Gamemaster
• K2 (1991 film) (no credit given) - confirmed by ateo357
• Land of the Lost (2009 film) (no credit given) - confirmed by AiAustria
• Magic in the Water (1995) (credited as Creature Effects Supervision - not allowed) - confirmed by AiAustria
• Men in Black II (2002) (credited as Project Supervisor - not allowed - and uncredited alien puppeteer as well) - confirmed by Gamemaster
• A Nightmare on Elm Street 2: Freddy's Revenge (1985) (credited as Assistant - not allowed) - confirmed by ateo357
• A Nightmare on Elm Street 4: The Dream Master (1988) (credited as Technician - not allowed) - confirmed by ateo357
• Oz the Great and Powerful (2013) (no credit given) - confirmed by Gamemaster
• Star Trek (2009 film) (no credit given) - confirmed by me
• Star Trek Into Darkness (2013 film) (no credit given) - confirmed by me

So it still looks like Bart J. Mixon, although the numbers are getting closer and closer together...