Akainu got that jawline that sets him apart. He's dressed properly, built like a tank, maintains his hygiene, is calm and composed until it's go time and the flower theme just adds a nice touch to his imposing looks that brings everything together.
Akainu was much better pre ts looks wise imo but the beard also suits him.
Shanks really looks bad lol. He's a pretty boi who doesn't look after himself.