My personal favorite is Poison Heal Breloom. Toxic Orb means it'll never die. Then just Spore/False Swipe/Sword Dance/whatever. That last move can be Worry Seed if you're worried about abilities.
If I'm going for a Grass or Ghost type, I just lead with something that has Soak.
>>30310638Technician. It hits surprisingly hard once you get it to level 90+, especially if you bother with EVs. Strong second favorite for me.