The roster for Skate 3 included 18 pro skaters, and 4 kind of skate-adjacent guys who were in there in more of a traditional video game character capacity (I googled this list, so if any are wrong or missing, that's Google's fault):
Skaters:
Andrew Reynolds
Braydon Szafranski
Chris Cole
Colin McKay
Dan Drehobl
Danny Way
Darren Navarette
Dennis Busenitz
Eric Koston
Jason Dill
Jerry Hsu
John Cardiel
John Rattray
Josh Kalis
Lucas Puig
Rob Dyrdek
Ryan Gallant
Terry Kennedy
'Character' Types:
Giovanni Reda
Atiba Jefferson
Michael Burnett
Jason Lee (as Coach Frank)
Based on that, I tried to come up with a roster that would be roughly a 2020 equivalent of that. These aren't all my favourite skaters, but trying to do a similar mix - big name pros that kids in the suburbs will recognize, well respected (but slightly less mainstream) names, 'legend' types, representation from a range of major current sponsors, and carry-overs from the previous games (this seems important in continuing a series 10 years later). The pros in the previous skate games would tie in to a challenge in the game, so I tried to include skaters who have signature styles or obstacles that would allow for that (i.e. skate trash cans with Tyshawn, skate a big stupid rail with Foy, go to the library with Suciu, etc.):
Skaters:
Andrew Reynolds
Milton Martinez
Jamie Foy
Tyshawn Jones
Oskar Rozenberg
Kader Sylla
Tiago Lemos
Mark Suciu
Leo Baker
Na-Kel Smith
Brian Anderson
Josh Kalis
Nora Vasconcellos
Ishod Wair
Gilbert Crockett
Rowan Zorilla
Bobby Worrest
Grant Taylor
'Character' Types:
Michael Burnett
Chris Roberts
Bill Strobeck
Weckingball