'69 would have been the TCB Band era, so that would be Jerry Scheff on bass, also James Burton, Glenn D Hardin.... really fab band and you can hear how together they are.
Scheff was actually an R&B bass player until he got the gig with Elvis, so he tended to bring an "un-country" approach to his role in The King's band.
He played on the Doors "LA Woman" and was invited to join them. Then Jim Morrison went and died and put the kibosh on that plan.
That's a band of awesome players having an absolute ball live. Definitely an R&B rhythm section and they do it well - all the right bits are there, but they are filling in the spaces too.
Definitely my kind of bassist - I'd love a rhythm section like that.