I probably have left out some of people's favorites. If so, please check other and indicate in your reply. And excuse my spellings where incorrect. :) Thanks.
Swiminton:
A couple of additions to your list:
Carolyn Bruce
Megan Jendrick - used to be Quann
Stancia Winfield - used to be Stitts
Kristi Kowal
Kristen Caverly
Rebbeca Soni
All of these people have made the USA National teams in breastroke events since 2003. This probably what is in other.
Tracy Caulkins gets my vote.
For the pre-lycra era, Catie Ball. Or Claudia Kolb, but probably Catie Ball - many national titles.
www.ishof.org/76cball.html
Well Amanda Beard is my favorite not only a breaststroker but I think the only breaststroker to medal in the IM in the Olympics and breastroke in a non-relay. The other Tracey Caulkins, who medaled in both IM's and the breaststroke in the relay. I like Leisel Jones as well.