Elijah Smith is great
If I had a brother Elijah and was called Lincoln or even worse Riley I would not be impressed. (Riley is a hard no OP)
Joshua or Jacob are my favourites - I'd go with Joshua as less common
Joseph Smith is a bit dull
Oliver and Leo nice but way overused
Elliot too similar
Alistair, Tobias, Zachary, Nathaniel, Dominic, Gabriel, Benedict, Jonathan, Sebastian, Maximilian, Nicholas, Gideon, Matthias, Barnaby, Julius, Cassian, Lucian, Jethro, Jerome, Nathan, Laurence, Silas, Lucus, Rufus, Jude, Guy, Joss, Seth