Certainly remember hearing Avery Sharpe with McCoy but it wasn't with that particular band - slightly later on, again at Scotts, when McCoy played there with his trio. I think Albert 'Tootie' Heath was on drums on that occasion.
Definitely John Blake. Can picture him now up on the bandstand in that white suit ! Saw that band with Blake around that period a couple of times (around 1981/82) and it was absolutely smokin'. Never heard Tyner play better than back then. Joe Ford completed the front line. John Lee was on bass and Wilby Fletcher on drums I think (had recently replaced Sonship Theus).
I think the band I saw was a quintet though - don't recall George Adams being in the front line (it was at Ronnie Scotts). They played several of the tunes from 'Horizon'.
To this day, I still rate hearing this band as one of the finest performances I've ever witnessed.
How about the hardcore acts like The Wurzels and The Yetties (not to mention Jethro )
Pam Ayres is Oxford I think so 'A Northerner' (ie. anyone North of Shepton Mallet)