Proper grown-up music

I listened to a Top 100 Albums poll this afternoon, as voted for by the self selecting audience of Radio 2. Not all Albums qualified. Albums had to have been Number one in the Album chart at some point in history. So, no Dark Side of the Moon, no Bat out of Hell, no Eagles, no Beach Boys.
Anyway, notwithstanding the vaguaries of these sorts of polls, I found it interesting that of this Top 100, 47 were shared amongst only 9 acts:

The Beatles 12 Albums (incl. one solo album each for Paul, John and George)
U2 6 Albums
Madonna 6 Albums
Robbie Williams 5 Albums
Led Zeppelin 4 Albums
Queen 4 Albums
David Bowie 4 Albums
Coldplay 3 Albums
Michael Jackson 3 Albums

Add another 8 acts, including Pink Floyd, REM, Dire Straits, Oasis, Paul Simon and the Rolling Stones, with two albums each in the chart, and you account for 63 out of 100 albums with just 17 acts.

The only reason I mention any of this is because, for the first time, I feel in the mainstream. My music collection is dominated by pretty much everyone of these groups. These are my favourite artists (apart from Michael Jackson). Just a bit of fun.