[KJL]

Your estimate of 43% is pretty accurate. The odds calculator on cardplayer has AA as about a 43% favorite against QQ, 99, 55, and KJ. However the calculator only works for 4 oppenents. But AK even it is suited and there are no cards from that suit out already, will not effect your edge by more than a few percent. If you want I'll figure out the exact calculation later.