I used to like Janine Lindemulder's work, but she has gone way overboard with ink. Here are few I dig:
Daisy Marie: Cherub on back
Belladonna: The most distinguishable pornstar ink, ever. Classic.
Avy Lee Roth: Shoulder floral pattern
Cadence Calibre: Pin-up style Dominatrix
Jennifer Steele: First Ammendment on her back
Julia Bond: Stylized wings on her back. BTW: all of the ink on her front is not good IMO.
Claire Dames: 'Hit It Harder' above pussy, 'Harder' on the back of her neck.
Nikki Nova: Impressive colorful back display
Michelle Aston: Japanese style crashin waves and flowers down her side.