I have a bias towards JJK so it's hard to argue this without sounding like a fanboy. I do think that even without my love for JJK, Megumi would at least rank second in terms of writing. I feel like he grows more than people give him credit for. One of my favorite lines from in the Shibuya arc is “even if I plan on risking my life, I don't plan on throwing it away”. Anyone else saying this line, I probably wouldn't have care, but this line hits me coming from Megumi. He may not have completely 180’d personalities but he has grown.
Aki I feel is a clear Top 1 in terms of writing. He has more character growth in less than 100 chapters than some of these other guys have in 300. I don’t want to spoil any of his story, but it's fantastic.
Yuno & Bakugo are fine. I don't particularly love either of those characters, but they serve their roles.
Edit: Ok I somehow forgot about Sasuke while making this post, that embarrassing, I’ll be brief. Sasuke is good. He’s like the main reason this archetype got popular. I haven't read Naruto in years though, so nostalgia may be blinding me.