When my kids got to be around 12 years old, we started having "Music Sundays". Every Sunday afternoon, we'd gather together and I would put on an album and we'd listen and talk about what we were listening to. We started with early Beatles and kind of worked our way from there. Some stuff they liked a lot, some not so much. We covered early blues stuff, late 60's country, progressive rock, 60's folk, 80's metal, etc. By the time they were around 15 to 16 years old, they had started their own collections and it wasn't uncommon to come into the house and hear Led Zepplin coming from one room and Nirvana coming from the other.
My kids are now in their early 20's and they both live in another state. I'll see them posting links to videos on FB to all kinds of music from all sorts of genres. They go to concerts by a wide variety of new acts and older artists that haven't recorded anything new in decades.
I get a real kick out of them when one of them will send me a text asking me if I'm familiar with a band or artist that I've known about for 40 years. One of my favorites was my daughter asking if I knew about ELO. I texted her a phone pic of a ticket stub I had from 1978.
I don't think there is really a top 10 list they should listen to. I think the key is a wide variety covering multiple genres from multiple decades. They'll branch out on their own from there.
Randy