i don't have a large collection because i don't really save them, but here are some sources just off the top of my head that have given me good breadcrumbs to follow:

• warp door
• my itch.io feed (i mostly neglected this until recently when i discovered that oh yeah, the people i follow have good taste.)
• paradise (see above)
• escapethealgorithm
• sweetfish checkout counter (i only checked out a few things but it was nice! i think it overlaps with my interests but it's not stuff i've already seen)
• bandcamp daily

the bandcamp daily is so cool, it's my only real music discovery tool. I also follow random people on bandcamp that have bought similar albums to me and "find" music through what they buy, it's great. youtube music in theory could be better for discovery but there just isn't the same support there