The dwarf gourami and rummy nose tetras should be good. As for the bottom feeder I like an otocinclus as they only get to be two inches. I would recommend getting larger ones, and/or more than one. I had one, and it disappeared for a few days. We read that this often happens, and that they will usually reappear alive and well. Well, 3 days later, he unfortunately turned up dead, and I now realize that we didn't have enough algae in the tank. I am waiting for more algae to develop before I get a replacement, but while we had him, he was one of the most lively fish in the tank, and he was a tireless little worker. If you ever do have an over-abundance of algae, he is a great little guy to get. Just don't get him right away—I would wait a few months and only then if you have sufficient algae. Other than that though, certain types of Cory cats would be good sized for a 10 gal
(one in particular that I saw at my LFS
but I can't remember its name only grew to be 2 inches), but I don't have any experience with them.
Oh yeah. With the dwarf gourami remember that he would rather be bullied to death that fight back—I know from experience
—and although I don't know anything about the temperament of the rummys, all I can say is do your research about that. Remember that just because a compatibility chart says that gouramis and tetras are compatible, doesn't mean that a particularly aggressive rummy won't tear him to shreds. Again, I don't know anything at all about rummys, but from experience, do your research.
Best of luck,
^The late "guru," dwarf flame angel gourami^