Re: Band members.
I see RUSH as doing the most with the least.... If you have less than Drums, Bass and guitar, people won't get it. Obviously this is genre specific, and there are rare exceptions - Like the doors, their keyboardist took advantage of his keyboard to fill in as bass as well since they didn't have a bass player. Also, the instrumental Djent bad Animals as Leaders uses 8 string guitars, so sonically, the guitars also occupy the bass range.