Morrison's FC did suffer near the end, but the rest of it was excellent, imo.
Busiek, most of the times, writes Superman the way he should be written. He's the counter to idiots like McDuffie, who don't have a clue, and Robinson, who writes some of the worst Superman dialogue i've ever seen.
Loeb used to be great, and if you went by the totality of his career, he'd be up there. Too much recent crap ruins it though...
Bendis is a Hank pym hating hack. f*ck him.
Starlin... eh.
Morrison, for me.