User blog comment:Willbachbakal/(Champion Concept) Skjold, the Shield Warrior/@comment-5088437-20130119205028/@comment-5088437-20130120084213

You mean 1 second, the same target can't be taunted twice, and the ability's duration is only 1 second. Additionally, you'd need to use his W to hit the enemy team. That only leaves your Q & E available for another 7 to 9 seconds. (6 second CD + 3 seconds holding for second W, unless you toss it out immediately and prolong your inability to do anything but auto attack.)

That is, of course, unless you used your Q to initiate, in which case you'd still need your W and R to taunt the enemy team leaving you with only your E to try and protect the carry for 6.5-9 seconds (Q), 7-9 seconds (W).

On the contrary, Galio has a massive AoE taunt, also has a ranged AoE slow, and he has a protective barrier he can throw on the carry. Rammus has a initiation tool with a knock back and a slow, with an AoE tremor to start damaging the entire team (which can be mixed with Rylai's), as well as a taunt. Shen, who is the lowest in options imo, has an AoE dash taunt, and can R onto the carry to give a shield against burst which assassins/anti-carries generally make use of to eliminate carries.

The only one with the Tank tag which doesn't follow this trend is Volibear, who has his Q for disruption, his E for more disruption/CC, and then puts out tons of damage with his R & W to keep himself a threat to the team, potentially destroying an Assassin/Anti-carry before they can target the carry.