Blessed Cardinal Newman, soon to be a saint, was extremely attached to a male friend of his, with whom he lived, to the point where he insisted on being buried in the same grave and cried daily for years when the man died.
St. Aelred of Rivaulx, an English monk from the 1100s, is believed by most historians to have either been gay or at least struggled with SSA. He was apparently in love with a fellow monk at his abbey and wrote a lot about friendship and love between two people of the same gender, while condemning sexual relations outside of marriage.
St. Paulinus of Nola, a bishop in the 400s who introduced bells to Christian worship, was allegedly bisexual as he had a wife but also a close male friend to whom he wrote erotic verse and love letters.
Those are the three best-supported ones I can think of. I do agree that there are many other articles claiming this or that saint was gay just based on some kind of conjecture on the part of the writer.
I also note that if all these guys were in love or had SSA but never acted on it physically, then the question arises whether one could really call them “gay” without them having actually engaged in gay sex.