No on the clown loaches. They can get to be a foot or more.
Go with Cory Cats if you want a bottom feeder... But dont get a fish because you want it to do something, get it because you want it. There are plenty of options, and they all like to be in groups. Peppered's, Bronze, Albinos, Pandas, etc.
Live plants... java fern, anubias, java moss... All low maintenance.