...i'd start that Queen is the follower for Led Zep, which certainly showed the way to May and co. Bohemian is impossible to perform as live due to "opera multi-singing" part and that makes it little bit questionalble song if we want to call it THE BEST. But, Zep could not perform Stairway very reliably at stage as far as I have heard those live versions - London live '71 was acceptable, but all others are more all less miserable.
Anyway, if I think the first time I heard Stairway...yes it is much "deeper" (very english feeling) than Bohemian, which is more hit song.
I know better songs - Genesis; Supper's ready (see the new video where Gabriel beats all - Bowie included. That is a real SHOW - and humor) and also Heart of the sunrise by Yes.