Hmmm, my mum's little brothers were R Alan and Alan S - so you can use a previous middle name for a first one if you really love it!

Rowan is quite nice. Not too popular and has a slightly other-worldy feel to it.

Ewan I like, nice and easy to live with.

Denzel... I think of Denzel Washington and I'm not a fan of most films he has been in, bit too serious.

Edan, tbh I'd go with the spelling Eden because of the stress you get growing up when other people decide you can't spell your name like that! And I'm not a big fan of the name Eden, which is growing increasingly popular.

Suggestions... I think Philemon Jude would sound nice. Reuben is a nice name too, but a bit more "earthy" than your other suggestions.

I'm thinking with a last name ...son, you could have John Johnson or Davis Davison or something like that. Or suggest it when your DH doesn't like your other name suggestions LOL!