I'm using Halbert as an example since I'm starting with his ads. But the same concern applies to John Calton, Clayton Makepeace etc.
My alternate path could see me copying high gravity Clickbank sales letters, but it feels impious to pass over the greats to instead copy faceless but proven sales letters on Clickbank.
Has anyone else dealt with this concern when doing their own hand copying? What are your thoughts on which role models are relevant and best suited to learning from these days?