Not sure if you're looking for featured girls that have tats or sites that focus on a selection of girls with impressive tats, but here are a few that come to mind:
ClassicsCash - JenniqueAdams
CountingStacks - TatQueens
DogFart - CandyMonroe
JoannaAngelBucks - CumOnMyTattoo + BigBoobsAreCool, BurningAngel, FuckMeInTheBathroom, HeavyMetalPussyParty, JoannaAngel and POVPunx.
MovieDollars - TattooedGirlClips
PanchoDog - CandieCrush, EvilynMachine, FelonyAngel, KorriAngel and SheDevilDolls.
PimpRoll - PunkRockGirlfriend
PornstarPlatinum - AngelinaValentine and EmilysPlayground.
SilverCash - NaughtyNati
SpookyCash - BarelyEvil, BlueBlood, EroticBPM, EroticFandom, GothicSluts, MichelleAston, RubberDollies, Scar13 and Szandora.
SwankDollars - Skinz
I haven't really tried promoting the alt girl niche, but if I were to, the two that I've put in bold would be my first go to programs.