Christopher Hitchens would qualify as Alpha. I was thinking of guys who qualify as Alpha, but do not conform to the jock or physically tough guy.
Colin Firth qualifies, again brainy, cultured, and not conforming to John Wayne type. Alpha, and that is with or even without fame.
Marlon Brando, although externally athletic, was intellectual. He is a stretch and not a great choice, but could easily fit in on this forum.
Russell Brand. Controversial, and perhaps disliked by a big block of both men and women. Definitely not in the dumb jock camp but complex etc. qualifies as Alpha with or without fame.
Che Guevara. Watch this video(first bit is silent with his plane landing, then audio kicks in), Che is talking politics, but if you watch how he 'carries himself', his eye contact, his presentation, Humour and Intelligence. Politics aside. It's probably the best example or a damn good one on charisma and what an Alpha looks and acts like in this type of situation.
http://www.youtube.com/watch?v=bMkoLLeng6A Intellect of highest order. Bookish-voracious reader. Introspective. Alpha.
I could go on and on and many may come back and point out which (or all) of the above guys they hate (or all) , and why, and etc.. - but that's not the point. I am merely trying to point out males who do not conform to the overtly masculine type. And I cover the full and very wide spectrum of personality and physical/personality types from Colin to Che.
Conclusion - All of the above would be very comfortable on this forum - not a doubt in my mind. And they all are cover the top three intelligence, humour and nice eyes!