I've made two lists and included all known and suspected partners I could remember.

Oldies But Goodies:
Gwen Christie
Susannah "Not His Wife" Fielding
Kat Dennings
Classic "Just a Friend" Sian
Jane "Nothing to Write Home About" Arthy

Current Harem:
Elizabeth Olsen
Oxford Gas Station Blonde
Instagram Video Brunette
Tall Brunette on Sidewalk
National Theatre Blonde
Totally His Sister (Looking Nothing Like His Sister)
Eternal Cowboy Boots

and his One True Love, William Shakespeare.