Wishbone Ash over a two year period in the UK and the US.

By the time you get to the last track it’s all about bluesy guitar solos but that soft progressive folk side balanced with the twin leads is Wishbone Ash at their best.

Vas Dis 1971 (Martin Turner Vocal)

Jailbait 1971 (Ted Turner Vocal)

Warrior USA 73  (Martin Turner Vocal)

Goodbye Baby Blues USA 1973 (AndyPowell Vocal)

http://en.wikipedia.org/wiki/Wishbone_Ash