Suggestions by @faisalalrasheed

Paul Weiland

as Director in Sonic the Hedgehog (90s)

Paul Weiland

as Director in The Young Ones Movie (1998)

Jeff Schaffer

as Writer in The Young Ones Movie (1998)

David Mandel

as Writer in The Young Ones Movie (1998)

Alec Berg

as Writer in The Young Ones Movie (1998)

Jerry Seinfeld

as Henry Detweiler in The Young Ones Movie (1998)

Alec Baldwin

as Balthazar Blake in The Sorcerer's Apprentice (2000)

David Newman

as Composer in The Sorcerer's Apprentice (2000)

Danny DeVito

as Director in The Sorcerer's Apprentice (2000)

Chris Savino

as Director#4 (Bohemian Rhapsody segment) in Rocktasia (1999)

Paul Rudish

as Director#4 (Bohemian Rhapsody segment) in Rocktasia (1999)

Craig McCracken

as Director#4 (Bohemian Rhapsody segment) in Rocktasia (1999)

Rob Renzetti

as Director#3 (Boys Don't Cry segment) in Rocktasia (1999)

Paul Rudish

as Director#3 (Boys Don't Cry segment) in Rocktasia (1999)

Craig McCracken

as Director#3 (Boys Don't Cry segment) in Rocktasia (1999)

Genndy Tartakovsky

as Director#3 (Boys Don't Cry segment) in Rocktasia (1999)

Tom Kenny

as American Little Angus in Beau Tie

Jason Marsden

as American Big Angus in Beau Tie

Pamela Adlon

as Beau in Beau Tie

Michael York

as Basil Exposition in Austin Powers: Animated Series (1999-2001)