bara doesn't mean strictly old guys, huge muscular guys or muscle-fat. it just means its content made to appeal to gay men. as long as they fit certain masculine standards and appeals to gay men, its bara.
there are characters that are popular in the bara fandom that people have taken creative liberties to draw them a certain way. Asuma is probably the most notable example as he gets drawn way off model too often.
don't get me wrong, he looks way better in fanart than official, but it still doesn't change the fact that a lot of characters get more idealized in fanart.
Naruto, Future Trunks, Kiba, Milo, etc. can all be drawn in a way that appeals to bara fans, but the characters themselves aren't really seen that way in the general fanbase.