Unless things have changed since I've been on, the B-26, mossie, and P-51B aren't all that common. I'm not saying they're rare, but they are (or were, at any rate) unusual enough to draw a passing comment such as "oh, look, a B-26. Theres something you don't see every day".
And I'm not sure we should count troop carriers such as the M3, LVTA2, and C-47, since those are 3 out of 5 of our choices and use of one of them is almost mandatory during CV ops, with the other two being either significantly slower, or carrying less than 1/3rd the number of troops.
I guarantee you if there were more powerfull troop carriers, they wouldn't be used.