If your surname ends in N then a first name ending in N might sound a bit too repetitve or rhymy. If you don't mind the N thing then maybe Dustin?

From your list I prefer Jonah. Some other thoughts are Jude, Tobias, Rory, Gabriel, Drake

I agree with your DH though it is nice to have a full name - I always think that you have to have a name that sounds as good on an adult and elderly person as it does on a child.