You know, I haven't actually seen any suggestions here of a woman who is obviously "less than" Dick is. Its nice.
Babs is perhaps not quite on Dick's level physically (very few regular humans are) but she's certainly smarter and just as experienced, and just as capable.
Kori is a lot smarter than her detractors like to pretend she is, and she's definitely well beyond Dick physically.
Power Girl (my personal ship at the moment) certainly has a higher IQ and is infinitely more powerful physically.
It seems that if anyone were to become arm candy in any of these dynamics, it'd be Dick.