One Piece? Ivankov and the Kamabakka Kingdom, Mr. 2 Bon Clay, and now Yamato. Ivankov was revealed back in 2009, before angry white men appropriated the word woke (RIP "Stay woke"). Mr 2 is from 2000.
HunterXHunter has Hisoka, who might be manga's first pansexual character, all the back in 1998. There are probably lots more, but I don't have time to look for dates for all of them.
DBZ isn't the only popular series, and there are many instances of LGBTQ characters in shonen, which are very much read by a lot of pre-teens. I mean, OP is on all the kids networks, and is hugely popular worldwide.
EDIT: In the end, I think this thread veered off in the direction it has because specious assumptions are being made for this film underperforming. If it was evidence of some mass exodus from Disney, then they should be suffering comprehensively, and not these odd films and shows here and there. There are probably issues relating to marketing and budgeting that factor way more heavily into this than political backlash. People who push that line always assume the rest of the public is as engrossed in the politics of life that they are. I think most people go through life with a sense of indifference to things that they aren't passionate about, and I don't think there is a ton of passion around inclusivity in Disney products. I always come back to the money in that regard, and I have to assume that the "woke" movement that some want to rail against is actually a money maker. Disney isn't altruistic, and I don't think there'd be a push to improve representation if there wasn't financial gain in it. That's why literally every media company that isn't pumping conservative conspiracies is getting on the bandwagon. If there wasn't money in it, there wouldn't be a major push industry-wide.