Slaking!
Truant is nowhere near as major of a drawback in-game as it is in competitive. Slaking can typically do enough damage to OHKO most opponents, and not many Trainers have more than two Pokemon (excluding Gym Leaders, Elite Four, etc.). This means that if you play on shift style, you can OHKO a Pokemon and switch out for no drawback. Even if you don't switch out, Slaking is so incredibly bulky (150/100/65) it'll be able to tank a hit or several anyways.
Slaking @ Silk Scarf
Ability: Truant
- Strength / Return
- Hammer Arm
- Earthquake
- Play Rough / Slack Off