Ramos wanted to buy Diarra, a rumour actually proven by Ramos saying he likes the player and then buying him at Real. However he was denied (by either Comolli or Levy) on the basis of our having Zokora (who was okay at the time, but nothing special) whereas Redknapp was able to buy Palacios (at not such a dissimilar price). Yes it might have Levy who said no, but the whole point of having Comolli there was not to be a yes man but to be an adviser to Levy, so Comolli would have had a large say anyway and so in my eyes carries a large (but not all) portion of the guilt in Ramos' downfall.
However your blatant bias against 'Wendy Random' as you have so maturely called him in the past is evident so I don't think even a reasoned argument would make you think otherwise.
According to Dan Ashcroft, who had an excellent source at Spurs during Ramos' tenure, we had the chance to buy Diarra. However, Comolli was big on psychological profiles and decided Lassana was a big time charlie and too much of a risk.
I agree that it's important to know, in advance, as much as possible about the temperament of any players we're about to spend millions in transfer fees and wages on. However, under Comolli we bought Kevin-Prince Boateng - around the time we allegedly could have bought Diarra.
And Prince Boateng is surely a classic case of a player's attitude preventing him from fulfilling his football talent. Boateng missed pre-season training under Jol to get married and go on his honeymoon. Then, last season, his major achievement appears to be suffering facial injuries in a scrap with Spurs fans outside a nightclub.
'Arry appeared to offer him a way back, but presumably Boateng's attitude in training didn't justify a first team chance.
Signing Boateng instead of Diarra, because our psychological profiles suggested Diarra was flawed, was a truly nutty decision.