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If you want a Pleco get a smaller one (the commons get close to 2 feet!)
If you do a lot of things in your tank (as far as hiding spots and what not) you may be okay, though you never know what will happen the angels, the males may kill the others in order to mate or what not, once a mating pair forms remove the others! Though I suggest going with 2 females if possible (should work a little better, but im not an expert!)
How far are you with the cycling? I'm excited to see the tank!
RIP Shark Bait, my Red Tail Shark :(