This is hard for me. In no particular order, me trying to do my personal top 10. And I'm trying to stick to people who did a regular run on a Spider-Book.
Steve Ditko - He designed some CLASSIC looks
John Romita Sr. - He refined those classic looks. Definitive look of the character
John Romita Jr. - One of the most dynamic cinematic Spidey artists. I miss his work.
Mark Bagley - Great energy, story telling, consistent.
Mike Wieringo - Fun bouncy energy that was made for Spidey. I wish we had got that uninterrupted run with him and Mark Waid that we were suppose to get. RIP
Todd McFarlane - Redefined how the character looks and moves.
Mike Deodato - I really enjoyed his work. I blame Marvel editorial for the Norman O-Face, so I don't hold it against him. (YUCK)
Terry Dodson - I'd love to see more of him on a Spider-Title. Did great work on The Evil That Men Do and the MK Spider-Title
Ron Frenz - Classic in every sense. I love his art.
Patrick Oliffe - This is more for Spider-Girl than UTOSM.
Frank Cho - One of my favorite artists... two issues and several covers isn't enough.
J Scott Campbell - Permanent cover-artists, it seems. Will we ever see that Loeb book that's allegedly sitting in a drawer somewhere?
Joe Madureira - His issue of Uncanny X-Men where Spidey guest-starred is probably still my favorite.
Luke Ross - loved the shape of his characters and detail of the work
John Byrne - Loved the art... hated the writing.
Erik Larsen - Brought some fun and energy, and some insane Sinister Six stories.
Ryan Ottley - I'm really digging what he's putting down. You can tell he loves the character. Too soon to rank against the past artists.
Steve Skroce - I know most will absolutely disagree on this, but his Spider-Man moved in a fantastic way... Spidey looked awesome.
And I love several others... I love the art so it's hard not to love some of it.
I disagree on Skroce lol. But, hey, nothing wrong with differing opinions.
When Erik Larsen was on ASM, I remember disliking him. I wasn't a huge fan of MacFarlane, and Larsen seemed like a step further away from the House Style. However, a few years after his run, I found I had great nostalgia for the books. There was something about his and Michelinie's run, like you say, fun, energy, and insanity.
While I love UTOSM, it's not really because of Olliffe's work. Frenz had a great ability to mimic classic Marvel but Olliffe seemed like "Frenz-light" and wasn't nearly as dynamic.
I've read some of the Luke Ross comics recently and I agree, he had a great feel for the character.