If your tank is established (I will assume not) then it's best to establish it first, there are many threads regarding cycling a tank, once that's done, I would recommend a couple of small Cory Cats and smaller fish like Neons or glowlights, You can get a school of 8 or so in there with the cory's, Then a couple of larger fish, like 6 serpaes, that will max out the load when they grow (assuming .75" for Neons/glowlights, 2" for cories, 1.5" for serpaes) but I'm a tetra person

a pack of 10 rummynose with 2 cories might be nice aswell, really the choices are endless, but make sure to start the fish don't exceed 1" per gallon (this is a guidline, not a RULE, but very justifiable) and try not to excced 1/6th the length of your tank for a single fish, unless it's a non active fish.. also increase the load gradually, don't just dump in 12 Rummynose or some will die (unless you watch water like a hawk)
Go to a
LFS, look around, see what looks nice, write down thier names (scientific names are better) come home, look up what size they get (too many people buy plecos and don't realize that a lot of them hit 18" long) and work out the fish you would like, the conditions the fish like (schools etc) and figure out for yourself what falls into those guidlines...
If you have any questions, the people here are quite helpful, and combined they seem to have kept every kind of fish imaginable.
(The tank you are putting together is something you will look at, not us, so make sure you are happy with the fish that are in there.)
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120 Gal SW, 150lbs Prem. Fiji, 23Gal Sump, 2x250w 15K MH, 4x65w Actinic
3 x Halichoeres Chrysus (1 surfed), 3 x Nemateleotris magnifica, 1 x Centropyge bicolor, 11 x Scarlet Hermits, 6 x Zebra Hermits, 40 x Astrea Snails, 6 x Nassarius Snails, 3 x Cerith Snails