Source: comicsalliance.com (Dearly missed)

3. Tim Drake (Robin/Red Robin)

There have been better Robins, but no one was a better Robin than Tim Drake.

Tim was a brilliant kid, who began to take notice of Batman's actions and found them troublesome. At the time, Bruce had just lost Jason Todd, and was being especially brutal about it. So Tim decided that Batman needed someone to lighten him up a bit and keep him grounded. He needed"¦a Robin. So he deduced exactly who Batman really was, and went off to aid him.

He joined up as the new Robin, and had a long and valued career, becoming the first Robin to have his own solo series (a pretty excellent solo series, too, I might add). Tim was there during Knightfall, and he was the first to realize that Jean-Paul Valley was a bad Batman replacement. Although to be fair, everyone should've realized this the second they remembered that he used to go around trying to kill people with a fire sword, under orders he received from voices in his head, which he believed to be religious deities.

Tim was Robin for a long time, and was one of the most iconic characters to possess the identity.