Natalie Black in her femdom stuff as well as starting out as a straight pornstar named Melissa Black
Zara DuRose similarly with the femdom stuff as well as occasionally doing hardcore scenes
Fetish Liza who's switched bunch of times in her femdom videos including anal which is really rare for a mistress
The big one I discovered was Mistress Miranda who I've seen on English Mansion and other fetish sites who has a good switch scene as seen here. I've looked all over for this scene but its gone even in siterips from the source site.