You'd need something which better encapsulates the power level of a pokemon; move pools, abilities, typing and synergies all play a role. There are bad pokemon with a huge base stat total, and a hypothetical pokemon with a tiny base stat total of 50 but with ground/poison typing and the wonder guard ability would be an absolute nightmare.

The Smogon tiers (NU, RU, UU, UUBL, OU, Uber) is a thorough attempt at placing all pokemon in tiers based on overall power level and to make interesting balanced matches at different tiers.