Hide and Squeak
commiecapybara
I'd highly suggest reading Banana Fish (manga); without spoiling too much, the main antagonist is the head of the Corsican mafia, and the author doesn't shy away from explicitly namedropping the CIA and its anticommunist operations in South America and Vietnam (among others), or the systemic abuse of children from marginalized backgrounds by the US government. The anime is good too, but it's set in the 2010s rather than the 1980s so some of the changes don't make sense (e.g. replacing the Vietnam War with the Iraq War).
I'd advise against using aitsu unless it's in an informal setting with friends. この人/その人/あの人 are the normal level of formality and are commonly used (lit. 'this person', 'that person', 'that person over there').
If you wanted to be extra polite you could always go with この方/その方/あの方 (gender neutral equivalent of 'this/that lady/gentleman).
GRSM is not inclusive of intersex people as Intersex is not a gender or a sexual orientation. That was one of the major issues brought up with the acronym.
From what I remember, MOGAI was coined specifically to address the issues with GRSM because GRSM was including coercive paraphilias but excluding intersex people. MOGAI means Marginalized Orientations, Gender Alignments and Intersex, and was coined by a nonbinary person on tumblr after input from a lot of other folks who wanted to be as inclusive as possible without including coercive paraphilias as being inherently 'queer'. (The term 'Gender Alignments' instead of 'Gender identities' used here was referring to whether someone was cis / aligned with their assigned gender or not, as 'marginalised gender identities' would include cis women and exclude trans men.)
QUILTBAG is just a mnemonic for the lengthening LGBTQIA+ acronym and stands for Queer/Questioning, Unsure, Intersex, Lesbian, Trans, Bisexual, Agender/Asexual/Aromantic, and Gay. There's nothing about gay stereotypes as far as I know.
Good news! https://www.anime-planet.com/anime/tags/trains