Thanks for all the help. I was starting to believe I was the only one that had gone through this.
I'm going to just feed the remaining fish well and hope they all recover (rods and garlic soaked flakes etc). I'll keep the tank as-is for a few months and work on getting the water even better (not sure how much better) and work on coral growth. If the remaining fish recover then I might add some more fish down the road and only fish that are very ich/disease resistant (ie Rabbit fish, madrian, damsels, chromies, etc.)
With one kid under 2 and another on the way I need to keep the hobby as easy as possible. I don't have time for multiple quarantine tanks or the space for more than my 55gal.
On the bright side, all my corals are doing amazing along with all my inverts. I can't wait to see what the tank looks like a year from now. Maybe I could get some cool inverts like one of those electric flame scallops.