capatable plants with fish

I need to know is what plants I can put in my community tank with the 
follwing: white clouds,pl*cos,neon tetras, glowlight tetras, black 
neons,aeunus & peppered corys,upside-down catfish, clown loach,some 
unknown cichlids (about 1 1/2"), har. rasboras, a female betta,horsed 
faced loach, and sometims transfering guppies to a 2 1/2 gallon tank.

All are listed in a 20 gallon tank with just gravel on the bottom. 
and my pH is 7.0

                              Thank you, 
           <'}}}>< *******    Zack