Yes it is. It'd make a nice Chlorophyll sweeper, since it has decent bulk but abysmal speed, so it can abuse Drought and sweep up.
Tangrowth @ Life Orb
EVs: 252 Sp. Atk, 252 Speed, 4 HP
- Focus Blast
- Solarbeam/ Giga Drain
- Sleep Powder
EVs: 252 Atk, 252 Speed, 4 HP
Nature: Jolly/ Naive
- Power Whip
- HP Ice/ HP Fire/ Sleep Powder
As a regenerator user though, I would advice Slowbro. Better recovery move and larger movepool means it's more suited to OU.