This guy just happened to have ranked his Top 16 MH artists:

http://compujer.com/jerome/?p=952

Don't agree with most of the selections or order, as I think Moebius was tops,
but he does have examples and names names which is what GOOGLE is for.

Personally, I really enjoy the SF work of Enki Bilal, a Serbian cartoonist.



For story and artwork to match, his Exterminator 17 can't be beat.
Written by Jean-Pierre Dionnett, the work's available in English.
The story ran in serialized form in Heavy Metal's early years.
I might be imaging it, but I thought the mag itself once was available on CD -- can't find it now.