There are many great inkers who worked very well with Gil Kane's pencils: Tom Palmer, Klaus Janson, and Kevin Nowlan. My favorite inker was Dave Cockrum. I already wrote at length about their Marvel-ous collaboration on John Carter Warlord of Mars #1.
This cover to John Carter Warlord of Mars #2 was another standout. Cockrum added his own style, but kept the essence of Kane's pencils. Nuff said.