I'd have to read the series again to find specific references, but I think it is strongly hinted at throughout the series that some Aes Sedai, Wise Ones, Windtalkers, and many of the Aiel Spear Maidens are lesbians, or at the very least bi-curious.
Various Forsaken had diverse sexual appetites. And I am not sure what label would fit for Balthamel reborn as Aran'gar.
So that covers the L, B and T I guess. As far as gay men, I'm almost certain there are male characters that are at the very least implied to by gay. It has been a few years since my last reread of the full series however.