Reggie Maulding; M.P for Barnet from 1950 until the late '70's, senior Tory politician for most of this time, fairly liberal overall... and a crook who was up to his neck in the Poulson mess and various other dodgy dealings (this bit wasn't known back then, obviously).
M.P for Rossendale until he retired in 1970, very much on the Left, a Christian Socialist and a Unilateralist.
Hast thee not heard of George "tired and emotional" Brown?
Silkin was the M.P for Deptford from the '60's until the '80's. Can't remember as much about him as I should...
Shore was the M.P for various East End constituencies from '64 until 1997. Best known for being strongly anti-EEC/EU, but was also the first politician to decide that something should be done about the state of the inner cities (way ahead of his time on that) and was an early supporter of Wilson.
Eric Heffer was the leftwing M.P for Liverpool Walton from '64 until his death in the early '90's. Strongly religious IIRC.