Characters who's whole thing is physical power. No reality warping, elemental manipulation, or magic just physical force.

Kim Dooshik (God of Highschool) Khai (End of the Ma'at) Julian (Centuria) Barsilov (Superhuman Era) Yuseong Seong (Jungle Juice)

Just so you know characters like Superman don't count since he basically has a dozen other powers not just raw power.