"Who are you?"
I think Maleficent’s shining game is Kingdom Hearts 1. In KH1 she is everything you described her as being: intelligent, powerful, and very much in control. I agree that her representation in KH2 is a bit weak, but in KH1 she’s near perfect.
So, I’ve gotten a few messages asking me to post a picture of myself, so here it is I guess.
Being a keyblade master sure comes in handy.