There are plenty of tangs that are very hardy and aren't ick magnets. First, you'll need to decide if you're only doing fish or going reef at some point. I'd stay away from angels if going reef. Also, you'd need at least another 100lbs of rock if you go reef (and maybe more light too).
In my experience (before I knew better), 3 clowns will be a problem, a male and female will pair up and most likely kill off the third. Unless you're talking about a mated pair of one type - like occelaris or perculas, and then another, maybe yellow striped maroon, skunk, or others. Go for tank raised or bred clowns. More hardy and friendly too IME.
Cycle with shrimp or uncured LR
. Look here - http://www.aquariumadvice.com/articl...q=2&fldAuto=15
The consider maybe 3 - 5 blue green chromis. They swim together and are VERY hardy. Then a clown pair. Look at gobies and blennys for more hardy choices also.
Purple, yellow, naso, bristletooth tang varieties, are those I've had, but I'd add the yellow last. They can be mean and territorial when new fish come. Check out my info for what's in my 155g