Are there any vehicles that can be fully operated solo?

I haven’t played War Dogs yet, so the closed beta will actually be my first time playing the game. I’m a big vehicle guy, but I also don’t really have friends to play War Dogs with, so I’m wondering how viable it is to operate vehicles solo.

Are there any vehicles that can be fully operated by one person, meaning you can drive and aim/fire at the same time?

For example, can you solo an AA tank or artillery vehicle? Or are those also strictly designed around having multiple players?

I’m assuming the regular tanks require at least 2 players (driver + gunner), but I’d love to know if there are any vehicles that work well with just one player.