[Copernicus]

If you add "or minimize losses" to your definition of optimal strategy then there theoretically strategies that are close to optimal. However, even the strategy for pre-flop hold em is a mixed strategy. As soon a strategy becomes mixed it can no longer be absolutely optimal under all conditions, even under the looser definition.

One interesting result is that if the deal never moves, then there is a provable positional advantage to acting second, which can theoretically be extended to acting last in a multi-player game. That condition exists (the deal never moves) in "dealers choice" home games where only one player happens to choose (and deal) hold em.