dude got shot in the stomach.... don't think that counts as easy
Came in, did what he had to do all in his own style and then left just as easily.
theres definitely a strong case for valcheck. dude really inserted himself into the situation early. he let carcetti know about the witness being killed which in turn got tommy elected. which we found out wasn't even a "witness killing" but someone shooting and bottles and killing dude accidentally.
i also wanna add Carver into the convo. dude got that sergeant position by being a spy against daniels. him and herc took that drug money too. but he actually learned what it was to be a cop and came up. dude was promoted to lieutenant.
lastly i wanna throw in michael. dude grew up with a mom that was the lowest type of fiend. she let her boyfriend molest her son, and after dude went to jail, let him come back and stay with them. dude learned actual marketable skills that would feed him and more importantly keep his little brother living out in PG county. and that was the main W, cause throughout the series mike's main concern was always Bug.