How to Select the Best Pokemon to Beat the Elite Four

this is your first time fighting the Elite Four, your rival will come up and battle you once you're at the door. His Pokémon are:

* Staraptor (Normal/Flying, beat it with Electric or Ice)
* Heracross (Bug/Fighting, beat it with Flying [X4 Effectivness], Psychic or Fire)
* Snorlax (Normal, beat it with Fighting)
o If you started with Chimchar:
+ Roserade (Grass/Poison, beat it with Flying, Ice, Fire or Psychic)
+ Rapidash (Fire, beat it with Water, Ground or Rock)
+ Empoleon (Water/Steel, Fighting works well, but Electric is not as effective)
o If you started with Turtwig:
+ Roserade (Grass/Poison)
+ Floatzel (Water, beat it with Grass or Electric)
+ Infernape (Fire/Fighting, beat it with Water, Flying or Psychic)
o If you started with Piplup:
+ Rapidash (Fire)
+ Floatzel (Water)
+ Torterra (Grass/Ground, defeat it with Ice, Bug, or Flying)