Marilyn Monroe was a legend because she had curves, an affair with John F. Kennedy and died young. Every role she played was the same...dim-witted, big-titted blonde ditz.
You want homogenous? How about Cameron Diaz? She plays the same roles, over and over. The only thing she's done outside of her typical ditzy blonde character was in Gangs of New York, and that was like watching a duck pretend it's a flamingo.
I'd like to see Keira do romantic comedies as well, provided they're not crap. That's the problem with so many rom-coms though. Too many of them are formulaic garbage. Real character gets pushed aside for silliness, and the characters become flat.
"Purgatory's kind of like the in-betweeny one. You weren't really shit, but you weren't all that great either. Like Tottenham."
I'll try being nicer...if you'll try being smarter.