In the gang, my fave is Dennis - he’s so vain and manipulative. I also like Mac when he’s in denial about being gay - I found that arc so funny.
My faves outside of the gang (I realize I’m naming a lot lol) are Uncle Jack, Artemis, Cricket, Z, and the lawyer that hates the gang
Pondy was an honourable mention for me. I know too many people like Pondy irl which makes him a little less funny but he is funny (and the coolest, as you mentioned)