Derek in Being a DIK, he's more complex than seen in the early episodes, even if most of his scenes are humorous or make him the butt of the joke. There's bits and pieces proving this in a lot of his heart to heart scenes with the MC, and he generally always has your back, even when it ends up stinging him.
Liam in Acting Lessons, same developer as BAD, a legit bro, and you actually care about him.
Chris in Leap of Faith, written pretty well, a fan of one of your Love Interests, but never goes passed that. A goofball, that does have trouble with women and you can pitch some of the LI's off on him, but he can pull his own women. It kind of makes sense, when you're in the same circle, that he may end up with someone in your proximity, just like real life.
Jalen in West View Academy, didn't know what to think of him at first, he's a bro, comes off as annoying sometimes, but he's the cool Childhood Friend that is just as talented as the MC. He isn't interested in any of the FMC, as he right away gets interested in a girl that is pretty much facially obscured, as a running gag.
Some things, I dislike when another character is potentially interested in a LI, but as I grew up I understand if you don't go Harem, that girl will have to move on eventually, so if they seek others I'm okay with it. I just generally don't like when it happens in game, if it's an epilogue or after-story, it's fine.