Well, personally, I feel that a 35 is too small for more than three of either Discus or Angels or any combination of the two unless you are able and willing to do daily water changes and then you still may end up with aggression problems since they'd be crowded.
maybe 3 discus! because the rule of thumb is 1 per 10gal
(doesnt mean you can out 1 in a 10! or does it! )
3 in there still may be a lil too much! but discus like to be in groups! and the angel IME are a lil more aggressive and territorial than discus and in that samll of a tank i dont think it would be so wise to put even one angel in with 2 discus or 1 discus!