In my humble opinion,this would be the ideal Zep setlist:
Immigrant Song
Black Dog
Communication Breakdown
Over The Hills And Far Away
Going To California
The Battle Of Evermore
Dazed And Confused
TSRTS
Whole Lotta Love/Rock N Roll
Trampled Under Foot
Ten Years Gone
Nobody's Fault But Mine
Moby Dick
Black Mountain Side/White Summer
Kashmir
Heartbreaker
Jimmy's Guitar Solo/The Train Kept A Rolling
In The Evening
All My Love
(Encore)
Achille's Last Stand
Stairway to Heaven
LONG LIVE LED FREAKIN' ZEPPELIN!!!