We have so many classics that tell a different perspective, you just don't read them. I don't care what you were forced to read in high school, you have free will.
Don't discredit the many greats because you want to assume they don't exist. The societal outlook has not yet changed, but you don't have to say this kind of stuff. It's unhelpful at best.
Obviously white men are always over represented, but your message is still incorrect, especially considering how many NEW books we have that are absolutely what you're looking for. But anyway, non-white male classic writers:
Alice Walker (gay Black woman)
Anita Diamant (Jewish woman)
Ursula K Le Guin (feminist and incredibly progressive)
Dorothy Bussy (bisexual woman)
Zora Neale Hurston (Black woman)
Chimamanda Ngozi Adichie (African woman)
James Baldwin (gay Black man writing about civil rights in many forms)
E.M. Forster (gay man writing about gay men)
Mary Shelley (female pioneer in science fiction)
Virginia Woolf (gay woman)
Mae West (wrote plays about sex, drag, and homosexuality)
Frances Gies (wrote history, still some of the best sources for their topics)
Christine de Pizan (medieval woman writer)
Robin Wall Kimmerer (Potawatomi woman)
Maya Angelou (Black woman)
C.L. Moore (female pioneer in weird fiction)
Ngaio Marsh, Agatha Christie, Patricia Wentworth (wrote mystery like no man in history ever has; Christie is the most sold author of all time after Shakespeare and the Bible)
Alexandre Dumas (mixed-race Black man)
Toni Morrison (Black woman)
Margaret Atwood (explicitly feminist works)
Anne Carson (translates ancient Greek works)
Khaled Hosseini (Afghan man)
Helena Maria Viramontes (Chicana)
Octavia Butler (Black woman writing science fiction, an incredible staple of the genre)
I didn't count any who wrote children's stories; it didn't seem relevant. There are thousands of others too, these are all just at least moderately well known.