Pretty straightforward; rank your best from favorite to least favorite and why.
I'll start:
1. John Bonham (Bonham makes up the whole foundation of Zeppelin. Sure Page started the band, but without Bonham, Zeppelin wouldn't be what it is back then and today)
2. Jimmy Page (Yes, he started the band, and he produced the majority of the songs in every album, so you gotta give him the credit)
3. Robert Plant (Yep, he provided some metal-esque wailingvocals, but sometimes he just overdoes the bluesy tones)
4. John Paul Jones (I dunno, I like his contributions to the band as bassist and keyboardist/mandolinist/etc. , but I felt that the other 3 made a bigger contribution)