Regal Angels and 4 foot tanks are fine - as I said in the last thread I had mine in there (I’ve had 2 Regals, one I technically still have it’s just not in my tank and is at the LFS I work at).
Foxfaces are a hard one to answer, I personally say they’re fine with 4’x2’ tanks but I also only really keep the “odd” species which are generally smaller (I’ve had Magnificent, Tongan Black and currently have Bicolour and Scribbled, I plan for another Magnificus). I’ve not personally kept Vulpinus or Unimaculatus but in LFSs I have had them in coral trays. They don’t get as big as fast. Tangs are always faster growing than Foxfaces and Rabbitfish are IME.
The magnificent and tongan black mix I had were in my 4’ tank. The main thing I found that may have been an issue to some people was the two foxfaces looked big in the tank.
Wrasse wise, I currently have a lot (I think I counted 15 altogether currently not including what I plan for or have sitting at the LFS) and have had a fair amount for the last 3-4 years now. I personally love the oddball species (
Pseudocoris yamashiroi,
Pseudojuloides species, Certain
Paracheilinus/Cirrhilabrus species).
C. isosceles is one that I used to own, I have had 2-3 that I lost for various reasons (my last one being old age). I definitely think it’s one to go for and one to add earlier rather than later as they are a shy species.
C. exquisitus is another great one! The only downside to them is they’re highly variational depending on the region they’re collected from, personally I prefer the Vanuatu variation.
I assume the Solon is the Red Head (
C. aquamarinus) if so, I would cross this off of the list whilst you explore wrasses - ideally they are to be added last and you never know what wrasses you’ll find along the way.