Lukas Haas has been a Hollywood icon for over 40 years. He starred in some of the classic films of our childhood, like Witness (1985), Lady in White (1988), and Mars Attacks! (1995).
Although his main focus has been indie doomed-romance-with-women movies, he has played several gay characters, generally of the angst-ridden, tragic-ending sort.
In Johns (1996), he plays a hustler who falls in love with a coworker (David Arquette) who insists that he's not gay, then is murdered.
In Last Days (2005), based on the last days of singer Kurt Cobain, he has a romantic relationship with Scott Patrick Green. The Cobain-character dies.
In Meth Head (2013), he takes crystal meth and destroys his life, in spite of his partner's attempts to save him.
In Widows (2018), he has sex with ladies, but at least you get to see his bare butt.
And you can't convince me that Chuck Montgomery in The Righteous Gemstones is straight.
His friendship with Leonardo DiCaprio has sparked gay rumors, but Lukas has made no public pro- or anti-gay statements.