Best synths of all time? (read OP before posting)

I'm running a backline business where I rent instruments to bands/venues for fly dates, and I'm building up my synth collection.

I'm looking for not only the most popular rentals, but the most powerful versions; for example: I get a lot of orders for the Triton Pro X & the Triton Studio, but I stock the Triton Extreme because it does everything both of those do + so much more.

What I'm NOT looking for is a list of the most influential synths of the 60s, 70s & 80s. I'm aware everybody owned the DX7 & the minimoog in their day, but no one EVER rents one now. People DO rent B3s all the time. So please keep that in mind. If you're going older than the M1 & D50, you're way up the wrong tree; thanks.