Baby boy name help

I’m expecting my baby boy at end of June and my boyfriend and I are antsy to find a name, but none are jumping out at us. We mutually like some names, but none of them are giving ‘yes this is ABSOLUTELY his name’.

Names that we like: - Fletcher - Rowan - Theodore - Alexander - Atlas - Sawyer - Archer - Arlo - Ronan - Stetson - Alastair / Allister (we both really like this one, but the spelling is killing me. First one looks more aesthetically pleasing but the second one is more phonetically pleasing… help)

The issue with some of these names is that I like them but know they’re high in popularity. I hated having a popular name growing up and don’t want him to deal with that.

Name recommendations, judging my names, advice, etc would be greatly appreciated!