Hi KCC Big Country!
Thank you for asking a great question. The top 10 dogs easiest to accessorize would be breeds that are the most even tempered and people friendly. I would to start with Labradors, Golden Retrievers, Yorky's, Miniature Yorky's, Daschunds, Miniature Pinschers, Pugs, Pomeranians, Chihuahuas, and French Bulldogs.
Hope that answer's your question, and again thanks for asking!