it is good to see that you are going this indepth to what you want to keep before you even have your tank. i for sure didnt and wasted so much money when i first started.
also remember that you are getting experiences from people and all systems are a bit different so what works of happens in one tank may or maynot work in another. i have a trio of occy clowns i have kept together for 4 years and never had trouble at all and they are always by each others sides. dominant male, female and juvi male. but i wouldnt recomend keeping more than 2(male, female) because the chance is there they may fight. so what works for me might not work for you.
i would say the best choice for schooling fish are going to be anthias or chromis. the anthias can be hard to aclimate and require much more care in the form of lots of small feedings. so for someone just starting out i would not recomend this. lots of food plus little experiance= problems...ie...algea, nutient issues and a bad impression of a great hobby. so i would save something like those for later on.
i think chromis are a great beginner fish and handle the mistakes made by us all when starting out real well(temp swings, salinity swings, nitrate, amonia, nitrite, ph and so on). i personally love the look of a school of chromis in a reef looks absolutly amazing. the only thing i would say is they tend to do better in groups of 6 and larger. this again is my personal experiance but i have had better luck keeping larger groups of chromis.
good luck and you will love this hobby!
-adam