I agree. In terms of pure brilliant "outwitting" Russell is the best player ever.
However,in order to win the game you have to get votes from the people you've cast out. And that, in a way, is what makes this a great game. Because to win the game you need a good balancing act between outright aggressiveness, yet not pissing everyone off.
It's the nature of the game, and Russell doesn't realize it. That's why he'll never win. Viewers will vote him Best Player Ever, but his strategy doesn't endear him to the people who control the vote.
Some, not necessarily myself, might argue that Sandra deserves to win as much as Russell. She's stayed on top of the game, aware of all the dealings and double dealings, but kept herself out of harm's way...that's as viable a strategy.