Fake It

I've got 57 corporate portraits and I've been given this JPEG as a background. This is therefore a test in timing, lighting and green-screening. The lighting is easy to sort out .....a little less on the right. The real problem is the quickest selection method - green screen leaves some nasty green tinges - even at maximum unfuzzy(extra - "the green test"). And White means spot healing from a lower level to replace any white in the subject.
What I'm asking is - what's the cheat here, I can't find a 2 minute fix for this, yet.