Where I'd rank them, from Levitz era forward:
1) Jim Sherman
2) Keith Giffen ... early!
3) Steve Lightle
4) Greg LaRocque
5) Pat Broderick
6) Stuart Immonen
Moy and Batista (current) would be after these, with Coipel considerably below that ... but still above the later Giffen.
Larry Mahlstedt deserves a shout out for being the best utility-infielder inker. Gene Colan for the single best guest shot, though I -am- partial for obvious reasons to Dawnstar and Wildfire meeting minds and hearts in LSH v2 n311.