While our all-time favorite still is Rent (2005), these do have some attractive points to it (and downsides too, unfortunately). Curiously enough, there's a decade between the release dates for all three while there are set pretty much around the same time, mid-eighties up to early nineties:
Philadelphia (1993, Jonathan Demme), the ultimate HIV/AIDS classic on the legal battle against discrimination. Has quite some real life inspiration.
Lessons learned: (a) privilege does not protect you from HIV, and (b) homophobia can be
Lacks in the department of: women. Only at the background, and the whole battle for rights is fought among privileged men.
Angels in America (2003, Mike Nichols), the we-are-all-connected esoteric epic on sexuality, coupledome, love, and HIV.
Lessons learned: (a) privilege does not protect you from HIV, and (b) HIV affects also those that are themselves sero-negative but with their lives inter-weaved in those of PLWHA, an obvious truth, but beautifully depicted. Also, (c) you cannot pray away homosexuality. Nor mental health issues.
Lacks in the department of: spirituality. All the angels, prophets, ghosts thing goes from whimsical to annoying to just crazy at times.
Dallas Buyers Club (2013, Jean-Marc Vallée), the quite shitty movie with a pseudo-alternative HIV/AIDS narrative that just got 3 Oscars. Also inspired by an actual person. Caused a major stirring not only because of the overall sexism of the movie but because of Jared Leto - a cis-male - being cast to play a trans person, and about how he does that.
Lessons learned: (a) heterosexuality (and homophobia) will not protect you from HIV, (b) homophobia is not
Lacks in the department of: women. Only at the background, and the whole battle for rights is fought among men. Women are the angry but passive doctor, nurses, and random people that men have sex with.
Other movies that we have talked about before where HIV drives some part of the plot are Kids (1995) and The Hours (2002).