Originally Posted by Elite Midget
I like them as much as Garen x Katarina, Shen x Akali, and Ezreal x Lux.
Garen x Kat at least has precedent in that they see each other as worthy sparring partners. Whether it goes beyond that is up for debate. Shyvana x Jarvan is most like this, as it does have roots in the lore (Jarvan was one of the first humans to treat Shyvana like a sapient being, and not like some animal or freak) and thus is possible for an official ship by riot.
Shen x Akali I personally ship but I understand it's not possible as Shen has no emotions and Akali is loyal to her duties as a member of the Kinkou. Shipping them, to me, seems out-of-character, but I personally like the idea of ninja babies. Maybe it's just me.
Ezreal x Lux LOOKS like a good couple physically (both blonde, thin figure, same skin tone, almost sibling-like...) and they would probably have some cool-looking kids, but personality-wise it's just not there. Lux is in a very fragile mental state (she's being forced to represent Demacia and has trauma from being taken away from her parents - who didn't even care - and raised by the military) and Ezreal's not exactly a loyal guy. He's an explorer, and explorers roam naturally. I just don't think a relationship between the two of them would work out in the long-run.