All paper developers are 'best'.
Since you develop your negatives to suit your paper and paper developer combination, that is. (If you want the 'best' results).
It's all about exploiting the potential of your materials. So you don't pick your paper developer after you process your negatives. You pick your paper and paper developer first, and then you expose and process your negatives to suit the characteristics of your chosen combination.
With that said, I like the economy of replenished Ethol LPD. Lasts a very long time, and has been my paper developer of choice for years.