I’ve seen several bands here and there over the years do this kind of thing Here’s a band with two bass players (one playing piccolo bass) no guitar There was an NC based rock band a couple years ago that had a really cool sound due to some interesting instrumentation. They had a guy playing a 4 string spector with a pick in more of a traditional bass role. And they did have a lead player but instead of rhythm Guitar they had a guy who switched between 6 string bass and a Chapman stick. They also had a female vocalist. Wish I could remember the band name so I could dig up some footage.