Addendum to option 1: I'd get 8 cpds, and either 6 rosy loaches or 6 goldring danios (danio tinwini).
That being said, I get the feeling you're mostly looking at Petsmart fish. Nothing wrong with that, but you're not going to find half the fish we just listed at Petsmart of all places. Here's what I'd do (as a former college student who broke the rules):
Rehome that angelfish. Yes, it's pretty. But a 10 gallon simply isn't tall enough, not to mention large enough to maintain an angelfish long term. Most books would recommend a 29 gallon minimum tank for angels going forward...I agree that a 29 gallon tank would make a good fit for one angel. But only one angel. They really do get huge. A suitable alternative though, would be a dwarf gourami, or honey gourami.
After doing so, I really think you have two options: rehome the platy, or rehome the clown pleco. Platies, like most livebearers, do best in a hardwater aquarium (lots of minerals in the water). Plecos on the other hand, prefer softwater; clown plecos in particular need driftwood to chew on for a healthy diet, which can lower the pH of the water.
Option 1: rehome the platy) If you rehome the platy, you still have the clown pleco. You could keep the pleco (remember to give it driftwod!) along with rams OR corydoras catfish. Not both, there's just not enough space in a 10 to feel comfortable with 3 different species of non-nano fish in there. For the rams, you'd be better off either buying 1, or buyin a group (like, 4) and giving the remaining fish back after pairs form. For the Cory cats, just buy 6. You might be able to get away with a school of like, glowlight tetras (Hemigrammus erythrozonus, NOT the glofish), but only if you're really good at your water changes.
Option 2: Rehome the clown pleco) If you rehome the pleco, you still have the platy. Unlike with the clown pleco, there's not nearly enough fish that are suited for a 10 gallon that enjoy hard water and that you can find at petsmart. What you can do, is buy multiple varieties of platies, and have a tank of like 8 platies. That being said: only buy males (they have a gonopodium, which is a modified anal fin that looks like a "rod"). Platyfish are prolific, and unless you have a livebearer predator, you will be overrun. And you don't have space for a livebearer predator.