Originally Posted by Rykaal
Support Nocturne can be a tank type support, block incoming skill shots heading at your AD carry with his shield, poke with his field of darkness thing, and an ult that can confuse the enemy while your AD carry nukes them down while they are blinded.
Tanky initiator, jungler Viktor
You forgot his main support ability, fear.
Gravity Field is a great initiation move. Power Transfer grants Viktor a shield to enhance his tankiness. Death Ray's AoE damage gives him clear speed in the jungle. Any of the augments improve Viktor's tanky jungler role, giving him either bonus health and a movement speed boost, greater range on his initiate and less reliance on blue buff, or faster clear speed, more bursty ganks, and a larger shield.
Attack Speed Alistar