Moyes or Hodgson, I think.
Forgot about Hodgeson, has done very very well with a limited but not tiny budget, he's got some very very good players in for great value, got them playing well and only really lack a proper striker to go alongside Johnson. The only thing is Zamora, just that one buy probably stops him getting it, how did he not know how much of a turd he is.
As for Chong making such a big deal about Palacios and Keane, Palacios as signing of the season, miles away from it he wasn't cheap it wasn't a coup, no one wanted to spend that big money on him in Jan, Harry spunked money again which is unsurprising. As for Keane, he wanted out, Benitez wanted rid of him, Spurs was his only real choice as Liverpool wanted to essentially cancel out what they owed and was the only team they'd get a good deal with. generally Benitez had made it abundantly clear he wouldn't be playing him properly, didn't want him, without Spurs making an offer he would have gone somewhere else for a bargain price, Spurs situation and being able to simply wipe out what they owed Spurs was how they managed to get such a good price for a player they wanted to get rid of.
You could argue both players were bought far to "easily" for far more than they should have been. 3 wins turned to draws/losses and you'd still be just above relegation.
Its not like spurs got Harry with a huge portion of the season gone. Often, say in Hodgesons situation last year, maybe Shearer now managers get fired more than half way into a season with the new manager very little/no time to sort anything out or bring in new players. there were 90 points available to be won when Redknapp arived at Spurs, it was hardly an impossible job for a team that should have been challenging for Europe to start off with. He's also spent a bundle, on a team thats had a bundle spent on it for years.
Ramos has won 17 games on the trot for Real madrid is it in the league getting them right up there with Barca, he's hardly poor, he most likely would have vastly improved and was mostly unlucky. Remember both your two "huge" signings were awful to start off with and needed games and have become very important both having significant influence on the points you've gotten since then, both Ramos buy's who have come good who were woeful to start.
Manager of the season, not even remotely close, Moyes, Hodgeson, Pulis, O'neill, Zola, S'bragia have all done FAR superior jobs imho. All for varying reasons, most with significantly worse teams, significantly smaller budgets all doing far better considering they team they have. O'neill has lost several key people this year including their single most important player and spent what, 1mil on heskey in Jan. Hodgeson not sure he spent anything, Zola, S'bragia have simply had to turn around the teams they had and they have done that impressively.
Infact, Zola might be manager of the year for me, some truly brilliant football being played before they got a bunch of injuries, doing great in the table, very little investment, playing "proper" football, attacking everyone for a manager in his first year.