Fox Mulder/ Dana Scully (aka msr*) from The X-Files.
They are without a doubt the best ship I have ever sailed and are the only otp I've ever had that didn't either experience some kind of complications or go on to make me feel hatred inside and make me wanna puke. They are just the ultimate OTP okay? I can't contain all my feels! I'm rambling!
*MSR stands for "Mulder Scully Romance"; it is a thing from the old days of the fandom that is still used.
Captain Jack Harkness/ Ianto Jones from Torchwood. (aka Janto)
I just love this ship. It's not the perfection of msr, but I just love it anyway. It makes me happy at least until Children of Earth, but I just ignore all that sad shit and go on with my life.