Rush are one of those artists that go straight over my head (see also: KISS & Bob Dylan) Everyone rants and raves about how good they are (ok, not so much in the case of KISS) and I'm there thinking In the case of Rush: I guess some of the music is alright; that is until Geddy Lee comes screaming in with his awful, awful (to my ears) vocal delivery. I wouldn't even bother trying to get past it because that voice is just anathema to these ears.
Case in point would be this song where it's going ok, then suddenly the vocals kick in
Then there is PEart with his ostentatious 300 piece drum kit. I dunno, over all it all comes across to me as very over earnest and muso. The Led Zeppelin influence - frankly - I don't hear it. Words I would use to describe Rush: tight, worthy, precise, sexless, devoid of groove or raunch, mechanical drumming. In many ways the complete opposite to Zeppelin. That is just my take on Rush, but they may be, as you say "the second Greatest Rock and Roll Band of All-Time" but personally, I will never understand their appeal.