Botvinnik is[was] definetely a good positional player. I still would vote for either Pertrosian or Rubenstien though.
Who's The Best Positional Player In Chess?
Difficult to rank any modern player ahead of Carlsen, considering that he has been quite clear #1 for many years and is considered to be positional rather than tactical.
I started liking botvinnik games nowadays.People who mainly play on initiatives,gambit or wild attack can learn the other beutiful side of chess from older 'less opening theory heavy' positional player's. as someone mentioned earlier he a was true fighter like lasker on board.Rumour was that he never played chess for fun.
here is one of his game