Grimmlokk
Ahn'Qiraj Raider
Miller had some real style at least even if you found it sloppy. There was a visual flair to it.It's hard to say though. Frank Miller is very highly regarded and a lot of his art looks like scribble to me too.
It's actually not hard to say. Those linked pages look like shit. Miller at least had plenty of pages that didn't look like crap.
Ultimate FF was always a pretty weak comic, but they had some flat out gorgeous art at times in the earlier issues. Not sure which artists were the great ones, I'll look a bit.
Greg Land had some good stuff.
Jae Lee and Stuart Immonen were both decent as well, but yeah Greg Land is the one I was thinking of. Looking at other examples of his work I just really like the style I guess.