If you look at the Incredible Bra launch (1/3/'11) I'd say you're right, Aldridge and Iman aren't that hot either, Lima and Swanepoel were the hottest in that shoot.
I think Erin's body is the reason why she is an VS angel, and I also think that goes for Huntington-Whitley and Ambrosio. Personally I would say Lima is the hottest followed by Kroes and Swanepoel, in my opinion these three are really the top at Victoria's Secret.
agreed
on the bold part