The Q-Men: Iceman
While he was attempting to pass as straight, he racked up a long list of exes. Judy Harmon, Terri Sue Bottoms, Zelda Kurtzberg, Annie Ghazikhanian, Shadowcat, Mystique, Opal Tanaka, and Mirage all rank among them. Of note, when it comes to the past womanly affairs of Iceman is the series Iceman by Sina Grace. Grace explores Bobby's past affairs with scenes that alternate between heart melting, action-packed, and both.
But, let's go back a bit. Iceman is famous for the trope of "untapped potential." Future versions of him are always showing up in rather over-powered forms (here's looking at you evil ice wizard from the future). This goes on to the point that he even gets upgraded powers "unlocked" while Emma Frost is inhabiting his body. This theme of laziness and irresponsibility carries through many writers' versions of Iceman.
A nice contrast to this is seen in Uncanny X-Men #515. Bobby is tasked with providing all the potable water for the X-Men's island nation of Utopia. A decent upgrade, though I'm sure it didn't give him that much free time to explore the Castro on the DL.
The responsibility grew after the Schism event. Wolverine decided that the militaristic ways of Cyclops on Utopia was no place to teach children. So, he decided to start a new school in New York and asked Iceman to join him before anyone else.
No one, yet. I was thinking "Who's everything this place isn't?" And I thought of you and came right over.
Wolverine, X-Men: Regenesis #1
After all that, some other stuff happens involving what I presume is a boy band based on name only (Phoenix Force Five). The school gets destroyed a few more times. Bobby's time-traveling younger self confronts him about his sexuality, and we're mostly up to date (aside from the X-Mansion being in Cnetral Park and Cyclops being dead).
Iceman's journey to find himself (by Sina Grace) goes beyond superhero comics and is a straight-up must-read for queer comic readers of all kinds. There's parent conflict, dealing with ex-girlfriends, and the turmoil that comes with waiting to come out of the closet. It isn't stuff that's often covered in comics and it is handled remarkably well.
That long list of exes particularly provides for some great material in Grace's first volume. Almost every reaction someone can have to their ex coming out to them is present and accounted for.
In current comics, Iceman is even comfortable enough to have hookups with other superheroes. Recently, he hooked up with Pyro. A lot can be read into this being akin to some kind of an alternate reality Spiderman and His Amazing Friends fan-fic, but I'm all here for it.
HE'S BACK! Iceman is back! Which is good, because someone is hunting the Morlocks for sport. Now it’s up to Bobby Drake to prevent another potential Mutant Massacre. But who’s behind this horrific hunt? You won’t believe it if we tell you!