Help me to decide;

[Timotaylor]

Roscoe
Franklin
Frank
Harris

my favourite is Frank purely for the simplicity but DH loves Roscoe

I love the name Frank, especially as a shortened form of Francis. Not keen on the other options.

Not super keen on Roscoe or Franklin or Harris.

I would use ..
Frank
Francis - Frank
Ross
Caspar
Harry
Henry - Harry

Frank or Franklin

Harris is Ok I suppose

Really don’t like Roscoe