Setting up FOWLR tank, need help selecting fish please

[ljcosta]

My aim is for a colourful tank that can survive beginner goofs. I would like a couple of larger fish (have 2 already) but with a bunch of smaller fish to fill it out. It's a bit overwhelming with the number of choices out there and just a couple of books for info but I don't want to end up with a pretty fish that was nice as a juvenile and turns into a terror when it matures (had that already with bad results). I'm not sure how many of each fish to get either (i.e. will a couple of different gobies get along if they have space). Thanks for the help.