I only had softies but they were in a 12 then later a 24 over the last 3 years.
The shrimp, emerald crab and some snails were key for cleanup. The emerald crabs were cool looking and good workers. Nudibranc's were cool but hard to keep very long. Something for the sand was essential (not snails) so some sort of Goby is key. The 5 spot goby (depending on the store) was key. My newtank has a starfish which does the job great but I'm not sure about it in a nano. I'm not sure others opinions but I think that having something for the sand is key. My friend had a engineer goby that did a decent job. (It looked like a eel)
I had a pair of clowns for years, they were awesome. (I've not heard about them being jumpers but mine were. In my JBJ cubes both jumped into the filter section once or twice over the years.) My new tank has Bengali cardinals which people throw in nanos. They are interesting looking but not very active.
I no longer buy hermits. I've got some that came with my tank that are fine, but the blue leg hermits that I had picked at my corals.