Okay, here goes nothing... This is for Black and White.
Normal: Best Physical is Body Slam (85 power, 100 accuracy, 15 PP, chance to paralyze). Best Special is Tri Attack (80 power, 100 accuracy, 10 PP, chance to paralyze/burn/freeze).
Fire: Best Physical is Fire Punch (75 power, 100 accuracy, 15 PP, chance to burn). Best Special is Flamethrower (95 power, 100 accuracy, 15 PP, chance to burn).
Water: Best Physical is Waterfall (80 power, 100 accuracy, 15 PP, chance to flinch). Best Special is Scald (80 power, 100 accuracy, 15 PP, chance to burn).
Electric: Best Physical is ThunderPunch (75 power, 100 accuracy, 15 PP, chance for paralysis). Best Special is Thunderbolt (95 power, 100 accuracy, 15 PP, chance for paralysis).
Grass: Best Physical is Leaf Blade (90 power, 100 accuracy, 15 PP, high critical hit ratio). Best
Special is Energy Ball (80 power, 100 accuracy, 10 PP, chance to lower Sp. Def.).
Ice: Best Physical is Ice Punch (75 power, 100 accuracy, 15 PP, chance to freeze). Best Special is Ice Beam (95 power, 100 accuracy, 15 PP, chance to freeze).
Fighting: Best Physical is Brick Break (75 power, 100 accuracy, 30 PP, destroys Reflect and/or Light Screen). Best Special is Aura Sphere (90 power, infinite accuracy, 20 PP, no aftereffect).
Poison: Best Physical is Poison Jab (80 power, 100 accuracy, 20 PP, chance to poison). Best
Special is Sludge Bomb (90 power, 100 accuracy, 10 PP, chance to poison). Some people might think that Sludge Wave is a better choice, but Sludge Bomb has a higher chance to poison. And that adds up.
Ground: Best Physical is Earthquake (100 power, 100 accuracy, 10 PP, no aftereffects). Best Special is Earth Power (90 power, 100 accuracy, 10 PP, chance to lower Sp. Def.).
Flying: Best Physical is Acrobatics. Yes, on the move page it says 55 power, but if you're not holding an item, or you're holding a Flying Gem... Ouch. Consistent 110 power, 100 accuracy, 15 PP, no aftereffect. Best Special is Air Slash (75 power, 95 accuracy, 20 PP, chance to flinch).
Psychic: Best Physical is Psycho Cut (70 power, 100 power, 20 PP, high critical hit ratio). Best Special is Psychic (90 power, 100 accuracy, 10 PP, chance to lower Sp. Def.).
Bug: Best Physical is Steamroller (65 power, 100 accuracy, 20 PP, chance to flinch). Some may argue about this, but if you get lucky, you can get some free damage with the flinch. It also has an aftereffect, which is more than X-Scissor and Megahorn can say. Best Special is Bug Buzz (90 power, 100 accuracy, 10 PP, chance to lower Sp. Def.).
Rock: Best Physical is Rock Slide (75 power, 90 accuracy, 10 PP, chance to flinch). Best Special is Power Gem (70 power, 100 accuracy, 20 PP, no aftereffect).
Ghost: Best Physical is Shadow Claw (70 power, 100 accuracy, 15 PP, high critical hit ratio). Best Special is Shadow Ball (80 power, 100 accuracy, 15 PP, chance to lower Sp. Def.).
Dragon: Best Physical is Dragon Claw (80 power, 100 accuracy, 15 PP, no aftereffect). Best Special is Dragon Pulse (90 power, 100 accuracy, 10 PP, no aftereffect).
Dark: Best Physical is Crunch (80 power, 100 accuracy, 15 PP, chance to lower Def.). Best Special is Dark Pulse (80 power, 100 accuracy, 15 PP, chance to flinch).
Steel: Best Physical is Iron Head (80 power, 100 accuracy, 15 PP, chance to flinch). Best Special is Flash Cannon (80 power, 100 accuracy, 10 PP, chance to lower Sp. Atk or Sp. Def.
Sorry for the really long answer. This is just what I think; there isn’t necessarily a right answer. I hope this helps! I got all the information from here: http://pokemondb.net/move/all