No.
For tanking, you need to be able to heal, raise your defences or just one defence, a means of incapactitating the opponent/opponents, and perhaps an attack of some sort.
Snorlax wise, Curse, Rest, Yawn, Return would work out okay but....
You could go Curselax, who tanks aswell, Curse/Shadow Ball/Return/Rest :P
It's mad as.