Is your husband a 6 foot 2 scandie - or does he wish he was?! Arve does sound like a Harvey from London, the rest I would assume were huskies. Tell him he will be very lucky to choose a middle name if he carries on like this.
Arthur nn Art was a good suggest from PP. Dashiell is a way of getting round dash, Philip nn Pip rather than Pep, Thomas nn Tam (Scottish), Sampson rather than Samuel?!
Scandie/German ish names that are workable in UK - Soren, Stellen, Anders, Nikolai, Alexander, Stefan, Magnus, Axel, Ivar.
Scottish that might appeal - Kester (form of Christopher), Struan
Otherwise - Guy, Blaise (Irish saint), Diggory nn Dig, Nathaniel nn Nat, Al as a nn for Alexander, Alistair etc, Ivan, Joel, Seth, Rufus, Rafe, Rory, Amos, Jonas