I have a peculiar artist to mention.
PariahExileWrath doesn't focus exclusively on AR or AP; in fact I haven't seen any AP in his gallery so far, and relatively few AR pics, but his commissions are somewhat cheap, done apparently fast, and he claims he'll draw anything he's asked; which shows in the wide variety of weird stuff in his gallery. He's quite hit-and-miss IMO, and his art style is rather special, but I still like it enough to mention him here, in case others might be interested.
Here's a link to his dA page, and some of his AR images so far:
http://pariahexilewrath.deviantart.com/
http://pariahexilewrath.deviantart.c...sion-635604675
http://pariahexilewrath.deviantart.c...sion-635075677
http://pariahexilewrath.deviantart.c...sion-641417809