Try bristlenose pleco (5 inches max) or 3-4 cory cats (bronze are one of the common ones), I have platies in my sorority, they get along fine, just make sure you don't get any hi-fins, the girls get a bit aggressive towards mine, it looks a lot like a betta female, 6 neons... You can get a mix.. 2 female and 1 male platy, one bristlenose pleco.. etc.. Or as Ofl said go to the lfs, see a fish you like and google its compatibility..
"You are forever responsible for what you have tamed."
Betta love: it's an international thing.
Azure, Sterling, you will be with me forever. Peaches, my crazy girl, I'll miss you the most.
The Boys: Tranny, Inky "Yume" Zuko, Mao, Onishiki, Chopin, Maelstrom, Kabuki
The Girls: Kamikaze, Beeuty Qveen, Beefcake!, Chunkers, Awesome Sauce
Meeces: Koko, Bijli, Baadal, Barkha
Turtle: Hi Handsome (female -__-)