Can you imagine Oliver Queen without Felicity? She's a figment of the TV show but fits so perfectly into the Arrow world that she's managed to outshine canon characters. That's a first rate scene burglar.
Every time Hannah's gay ex Elijah pops up on Girls it's safe to say something wild will happen. Whether it's a coke-fueled club night or crashing a weekend at the beach, his fast talking wit helps him steal every scene he's in.
Daryl is another entry written into a fictional world for TV that we couldn't live without. Nothing like his brother, his love for Lil' Asskicker and connection with the survivors won our hearts. If he goes, we go.
Monroe has all of the personality on Grimm. He has the humor and the successful romance. He's more of a lead than Nick, but he's living on the wrong side of the fence. We don't care. He still steals every scene.
Whether Mona's being crazy or cute, she draws attention. That she's managed to blend in as a member of the A team proves how great of an actress Mona is, because otherwise it's impossible to take your eyes off of her.
Sure, the show is about clones and Tatiana Maslany gets the accolades for playing them, but who has to play against them? Felix gets all the best lines and Gavaris' job of treating each clone differently in various scenes hits the mark perfectly.
There is a prophecy. The man who doesn't perish at the blade of Ra'a al Ghul will become Ra's al Ghul. Ra's al Ghul doesn't offer, he orders. Oliver! Don't delude yourself into thinking you have a choice.