Mukai Ai 向井藍 is my favourite. She is like a perpetually tired-looking version of Gouriki Ayame. Ayame has a cuter face, but Ai has a cuter body.
Ai does a number of vids for the ***Japan series (LegsJapan, HandjobJapan, FellatioJapan, UraLesbian, and whatever that gravure one is called) as well as stuff for other companies.