Forged in Battle has the clone wars AT-TE, with a primary crew of 3 and up to 4 secondary gunners, and the LAAT/C designed to transport the above, with 1 pilot and 2 more seats if needed.
So excluding gunner spots, that's a party of 4- Pilot, Driver, Vehical comander, copilot/spotter. Could even have multiple tanks so you're not going alone.
I'd be interested in a game with this premice, either a Clone wars "war movie" or with refrbished tech in the rebel era.