Two of the more popular physical tanks are Skarmory and Steelix. Together they cover each other's weaknesses (except Fire), but I personally prefer Skarmory. No one can say no to a ground resistence.
Anywho...
Skarmory @ Leftovers/Chesto Berry
Impish Nature
- Drill Peck
- Roar/Whirlwind
- Spikes
- Rest/Roost
Chesto Berry if you want to have a free Rest... Leftovers if you have Aromatherapy/Heal Bell support. Roost is a decent move, but it doesn't cure status problems. Rest will always be the best recovery move.
Or if you choose Steelix...
(two kinds of movesets)
True Blue Wall:
Steelix @ Leftovers/Chesto Berry
Impish Nature
- Earthquake
- Rest
- Stealth Rock
- Roar/Toxic
Pretty much the non-flying, slower version of Skarmory. Earthquake for STAB, Stealth Rock-Roar for a good annoying combo (or Toxic for a surprise), and Rest to keep him alive.
Pseudo-Attacking Wall
Steelix @ Leftovers
Adamant Nature (or Impish Nature)
- Earthquake
- Stone Edge
- Thunder Fang
- Explosion
This Steelix I personally made up and he can't survive like the other, but it can work well methinks. Steelix has a monster Defense stat... it's simply insane how high it is. So with all that Defense, he could go with Adamant to give him some extra Attack power, while not suffering from a major decrease in tanking ability.
Earthquake for STAB, Stone Edge for whatever Earthquake can't hit (like Skarmory). Many bulky water types like to switch in to Steelix and pwn him, but (with prediction), Thunder Fang will make them think twice. And finally, Explosion... Steelix has slightly average Attack, so Explosion won't do as much as with, say, Metagross, but it's pretty much an OHKO on anything doesn't resist it, or else doing at least 80-90% damage... could give you a leg up.