This is just my opinion/thoughts
Straights-
Clint, T'Challa, Jean Grey, Thor.
Bisexuals-
Natasha, Wanda, Steve, Bucky, Shuri, Erik Lehnsherr, Scott Summers, Jubilee, Warren, Ororo.
Bi-Curious-
Pietro, Tony, Bruce, Peter Parker, Wolverine, Scott Summers.
Pansexuals-
Peter Maximoff, Loki, Kurt Wagner, Charles Xavier, Hank McCoy, Mystique.