Hmm... well I've already got 100k miles w/ BA from credit card things, so that might be one of the options for earning...
WN is a non-starter.
VS feels a bit constrained in the same way AS can be.
I'll look into avianca vs aegean I suppose, use BA for the random oneworld, and avoid the rest if I can.
Good news is I'll save a hundred bucks a year because I'll ditch my united prez plus card in lieu of either a boardroom membership or an Amex w/ priority plus...