Ashton pretty much covered the worthy deviants to look for in DA. But I have some that in my opinion are in need to watch.
http://liquidxlead.deviantart.com/ - A very talented artist who's great in drawing known anime/video game girls with big breasts and/or plump butts. He's not bad drawing other people's characters either. Also, his commission prices are very manageable, especially the prices for colors when his coloring is very well done. Check out my commissions from him of Grape and Geil-Ling.
http://reggwatson.deviantart.com/ - Another artist with a unique style in drawing hour-glass shaped women. He just come back in posting his art but his previous works are great nevertheless. He have his own original Naruto characters and ask other artists draw his female one in art trades. As for coloring, his skills are pretty stunning after seeing his latest post. At this time, he's trying to plan on taking commissions for the first time.
http://balak01.deviantart.com/ - An artist I known for some time. He used to have his site about his big breast art found in the Page of Boobs link page. His site is down but got a gallery in DA now. Like how she draw busty girls in his comic/cartoon style. Recent pics he did are of his Bleach fan art.
http://rsj.deviantart.com/ - An artist that is part of the East Coast Artists Unite group and a good one to boot. His drawing style is almost similar as balak01. He has done submissions for the usual Gold Digger annuals and swimsuit ones, made the XXX-Jo-Oh! comic for Joshua Lesnuck's Slipshine adult webcomic site, and such. His fanbase is all-around, from Naruto to Gold Digger and from Teen Titans to Gorillaz. Because of that, he does some nice fan art. He does take commissions as well, but you have to be patient to get one since he's pretty busy.
http://zeroa.deviantart.com/ - A.K.A Andy Robles, another artist of the ECAU group. All I can say that both his drawing cloring skills is amazing. Draws great fan art, mostly of know video game girls.
http://lordcoyote.deviantart.com/ - This one definitely draw some sexy pics of his original characters. He mostly draws his own original characters but they're busty to boot.
http://limeykat.deviantart/ - An artist I know that is a Gold Digger fan. She got this style that is a hybrid of human and furry art. But she does a lot of busty pics especially of her avatar-self.
That's it for now, I'll see if I can remember some more next time.