I love all of these so it’s a really tough choice. Here are my ratings and comments:
Sullivan 8.5/10 There’s something about Sullivan I really like: it’s warm and friendly, youthful and mature. And Sully is brilliant! It’s a great name.
Felix 10/10 Felix is one of my absolute favourites. It was our other choice for our son’s name actually. It’s spunky and effortlessly cool and could be worn equally well by an artist, a lawyer, a sportsman etc etc. There are no negatives with this name in my opinion.
Atlas 8.5/10 Another very cool name. I think I just prefer the similar Atticus but it doesn’t carry the baggage that Atticus does. The only possible downside with this name is that it’s getting a tad trendy, although not enough that I wouldn’t use it if it were my top choice.
Orlando 8.5/10 I love this name. It’s romantic and mellifluous yet entirely wearable. My only issue with it is that people would be inclined to shorten it and whilst I don’t mind Orly, I prefer just Orlando.
Sebastian 9.5/10 Sebastian is one of my all time favourite names. The only reason I didn’t consider it more seriously for my son is that it’s a little more popular than i’d like where I live. For me, Sebastian is an incredibly sophisticated, intelligent, beautiful-looking/sounding name with fantastic nicknames (I love Seb and Bash).
Based on this list, you might also like Jude, Milo, Oscar, Phineas, Hugo, Otis, August, Caspar, Rex, Asher, Enzo, Lucian, Tobias, Jasper, Bastian, Remy, Soren, Elio, Ambrose, Dashiell, Flynn, Kai, Louis, Magnus, Otto, Leopold, Marlowe, Rory, Xander, Kit, Roman or Angus.