LOL. To quote Olympia Dukakis’s character Rose in Moonstruck, what you don’t know about women is a lot.
Believe it or not, sometimes “fangurlz” are attracted to things other than mere square-jawed Ken dolls. The right style, the right accent, the right attitude, and we’re all there.
I mean, from the start, your premise is off, because there’s nothing wrong with the looks of any of the men you mentioned (least of all Ferguson, WTF?). But more to the point, each one of them has charm, dash and charisma up the wazoo.
I’m not a Tennant “fangurl” (hmmm nicely dismissive there) but again, he’s dashing, he’s good-looking enough, and he’s got plenty of chemistry with everyone. Oh, and like Capaldi, he’s an immensely talented actor.
If Capaldi could make Malcolm Tucker in The Thick of It an attractive character despite Tucker’s foul-mouthed, manipulative cruelty (and yet I know lots of women who sigh over his more vulnerable moments and how kind he is toward Sam, his female assistant, in the second-to-last episode of Series 3, and that’s a scene of about 5 seconds!), he can sure as hell do it for the Doctor.
As mentioned above, Hugh Laurie in “House” turned that misanthropic mess into a massive sex symbol. Laurie, an incredibly humble man, was likely astonished, but I certainly wasn’t. All that and without his British accent, too! If Greg House had kept Laurie’s accent, yowsa.
If there are fandoms for Tom Baker’s Doctor based on ‘shipping’ him with his various companions, I don’t see why Capaldi shouldn’t get some loving either. The man is an eye-magnet no matter what he looks like–he commands attention in everything he does. I’ve been looking forward to this regen with bated breath ever since the announcement and I can’t wait to see what Capaldi does with the role.