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Edit, he wants Blue Emperor Tetras aka Inpaichthys kerri.
Emperor tetras are good tankmates for angels, IME.
You could have a dozen, if you're not intending to have too many other fish; you could still have eight or ten corydoras or loaches as well, or a small plec.
One point about angels though; two very often doesn't work, unless you get a mated pair, or start off with six or seven youngsters and let a pair form before rehoming the rest. Angels (and a lot of other cichlids) don't like having mates picked for them (even if you could sex them, which is very difficult).