This is my uber epic Tank Olaf that trust me works AMAZING but Il go into more detail down here....

These are jsut my standard tank runes food for well not dieing early game.

Standard Tank Build for me I like um like this.

Ok Now it gets fun I get Warden and Heart of Gold Early for quick Cash food armor Health and Health regen so I can stay in lane longer.Now I got my Omen you take very little damage and ome Your W starts to get fun and with it you hit really Hard.Now this one is Tricky ok you have to think if you are fighting any AP casters at all get the FoN if not say screw it and get a Thornmail you will never die and they will do anything and jsut take more damage.(I mean when you fight a good Garen and he ultis you 2wice and silences you 3 times will spinning and all that and you kill him jst takeing it and not going below half health its epic.)Now the Frozen Mallet so its harder for them to escape because your pretty slow.Warmog because hello a ton of health and Regen PLUS your W is now godly :) you will have roughly 220 Atk Dmg with it so that pretty Hard I think for a tank.Now last but not least the Atma :) even more Armor but now you will Have a TON of Atk Dmg AND Defense plus with your W you have over 300 Atk dmg AS A TANK!!!!!

It's really just how ever you like it I jsut do it this way.

That is my TankLaf Build and it works godly for me lol.I hope you guys think so also.