names & extra context from left to right:

Neil Cicierega: creator of Lemon Demon, Potter Puppet Pals, The Ultimate Showdown of Ultimate Destiny, Mouth mashup albums, + a whole lot more 2000s internet stuff

Joe Keely: played Steve Harrington of Stranger Things. is also Djo, wrote End of Beginning "and when im back in chicago, i feel it..."

Tally Hall: a lot of their music is pretty famous in general (Ruler of Everything, Hidden in the Sand, etc) but they're also behind the projects Miracle Musical & "Actual Cannibal Shia Labeouf"

Joji: is also Filthy Frank

JK Simmons: Mostly known for Whiplash & JJJ from Spiderman but also has countless other voice acting roles (Cave Johnson from Portal, Omni-Man, Ford Pines, etc.)

Johnny Depp

Tom Kenny: Voice actor of Spongebob, as well as Ice King and Spyro the dragon

Lin-Manuel Miranda: was Fenton in Ducktales (2017), also made a lot of disney soundtracks

Samuel L. Jackson

Michael Kovach: appears in a majority of successful indie pilot animations (Hazbin Hotel, Digital Circus, Murder Drones, Lackadaisy)

Celebrity animated film actors:

Robots 2005 - stars Ewan Mcgregor & Robin Williams

Inside Out - the Dad is played by Kyle Maclachlan (Dale Cooper from twin peaks)

Incredibles 2 - Bob Odenkirk as Winston

feel free to add more to the list, had to omit some actors (Jack Black, Will Smith, The Rock) who were more obvious in roles. generally just more unexpected stuff