I thought they all went okay with the surname, but Tobias is the only one that stood out to me as great with the surname.
Arthur - love love love
Tobias - like like like
Booker - I loved this one until someone told me it reminded them of booger :( it is such a lovely name
Leopold - I really like Leo! but the full name feels a bit flowery to me
Laurence - I love the nn Lance and Renny, but the possibility of Larry makes me dislike it.
Sidney - I know 4 girls named Sydney and I dislike Sid so I definitely have some votes against it in my head
Walter - sorry this is too old man for me
Edmund - really not a fan of Eddie, but it is a lovely classic name
Llewellyn - this is L overload to me, I don't mind the "well" bit though, maybe an alternative like Lowell, Weland, or Roswell
Wolfgang - I don't mind Wolf as a middle, but I can't get behind this as a full first