Weberson Santiago is one of my absolute favorites. His work is so full of atmosphere!
There have been some great suggestions on this thread so far, I could list artists all day. Seriously, the spreadsheet for my website has 500+ names on it. A big one not mentioned yet, although his style remains very similar throughout, is Vincent Dutrait. His work, all hand painted I believe, is just exceptional.
I’ll resist the urge to just spam links from my website and point out some interviewees I’ve liked and their sites instead. Josh Emrich (Campy Creatures / Caper) is fantastic, Kyle Ferrin (VAST, Root) is one of my all time favs, Natalie Dombois (KIWETIN), Cinyee Chiu (Dragon Castle).
I could go on but I’ll let some other people make suggestions!