I'll go by house and in alphabetical order. For the Gryffindors, I'd say one of the Weasley, but I think Head Boy is the only one left. For Hufflepuff, there's Ernie Macmillan. Ravenclaws, you have Terry Boot. He might be gay, but that would make him the perfect husband, leaving you free to fuck whomever you want. If we look in Slytherin, there are Cass Vaisey, Terence Higgs, Miles Bletchley. That's if we look at our year or just above, but I'm sure there are more.
The rest is bullshit. Miles wouldn't care. He has a first born, you have a child. I'm sure you'd find more.
Then stop worrying. Shag him and worry about it later.