When I had a baby (see avatar), I spent a few years writing songs in my studio and enjoyed writing in different tunings- really inspirational in different ways. When it came time to create a live band, I quickly realized that not having a road crew and a fleet of guitars was going to make this ridiculous.
I don't like transposing pitch shifters- I can feel the vibrations and don't want that to be a major 2nd away from what I am hearing, you know? Plus the tone is simply not as good (though Kemper is impressive). My solution was to pick 2 tunings: I chose drop C and a 7 string in dropA. They can each quickly go to standard D and standard B, plus the 7 has E inside of it. If I had to do it again, I might consider dropAb instead as I could throw a cap oonto the 4th fret and cover the dropC stuff with the fretmarkers in a normal sequence in case of string breakage.
This doesn't help the OP as he has to blend into an existing band, but if you are starting a band, be aware of how miserable this can be trying to make 8 different tunings come to life on stage!