I would definitely vote for Veronica Avluv. Although there are quite some 10on1 scene, SZ1619 has been one of my all time favorite in LP.
At the beginning, the director asked Veronica how many men can she handle at one time, Veronica said she've tried 7 guys in private and 6 guys on camera. Then director said, we have 10 guys for you today. I know this might be staged, but it's still so fucking hot! Imagine this whore had 7 guys to fuck her in her private life!