Just to add to your joy, anyone who has ever read a book called The Choirboys by Joseph Wambaugh (it was very popular book in the 70s/80s) would never call a child Roscoe in a million years and would wince at a child with such a name.
I read that more than once in the late 80s and never even made the connection here - I only thought of the Dukes of Hazzard - so it is of course an exaggeration to say that anyone who has read it would wince at the name.
OP, I'm going to buck the trend and say I love Florian! It reminds me of Onkel Florian, a minor character in the Chalet School books, who was a big strapping Austrian chap capable of carrying fainting schoolgirls down a mountain. Not at all wet.
I like Gilbert/Gil too, and don't think that would be too out of step with current name trends. I'm neutral on Clement simply because of the rise of Clementine for little girls - I knew a lovely man called Clement/Clem but probably wouldn't use it these days for a boy, and I'm not keen on Clarence or Roscoe.
I agree with those who have said that most people will be polite when introduced to someone, regardless of how 'out there' the name might be, and if you get to know a person then that name just becomes 'them', no matter what other/previous associations you might have.
And as for a child hating their name because it's unusual...I've seen far more threads where people bemoan their parents' choice of name either because the spelling (not the name itself) was unusual or for precisely the opposite reason; that they were the sixth Debbie/Lucy/Jill or whatever in their school year and so always had to be known by their surname or its initial as well as their first name.