Barney and Robin - Lily (How I Met Your Mother)
Lily spent seasons pushing Barney and Robin together and even locked them in a room in order to get them to define the relationship. She did all of our work for us.
Oliver and Felicity - Diggle (Arrow)
Diggle was the first person to notice Felicity's feelings for Oliver, and his facial reactions represented the fanbase every time they shared a moment.
Jake and Amy - Charles (Brooklyn Nine-Nine)
No one ships anything as much as Charles ships Jake and Amy. Let's not forget that he considers "Jake and Amy are getting married tonight," the title of his sex tape. A little weird, but we get it.
Betty and Archie - Kevin (Riverdale)
It's Kevin's optimism that keeps us holding on to hope. Betty and Archie may not be together right now, but we have faith they'll get there someday.
Ben and Leslie - Chris (Parks and Recreation)
It definitely wasn't easy for Chris to testify against Ben and Leslie when he knew they belonged together. But after the whole mess was over, he became their number one fan and was just as excited about their relationship as they were.
Stefan and Elena - Caroline (The Vampire Diaries)
Caroline may not be a Stelena shipper anymore considering that she ended up marrying Stefan herself, but there was a time where she was their number one cheerleader.