I took your comments as being about limiting Kang to black actors.
I noted the problems with just picking someone new. It's cleaner, but it does still get into the whole question of whether we should pretend this Kang looks the same as the others. I was pretty clear that the films would acknowledge that the Kangs played by different actors look different.
A simpler solution would be to pick an older actor, who probably wouldn't want to do more than be the big bad in 1-2 movies and make a few cameos elsewhere. But there's still the issue that Denzel Washington doesn't look like Jonathan Majors + 36 years (granted, with an older character come excuses for physical changes like the cosmic equivalents of plastic surgery.)
I also thought that Chukwudi Iwuji and Djimon Hounsou are decent actors, who fit this genre pretty well, and I'd like to see more of them.
"As toxic."