Possible Clues:

• Image consultants
• Spin docs
• Image creators, for short
• Guys who spin
• Image crafters
• Ad agency guys responsible for 20-, 38- and 54-Across?
• Image creators
• Guys who make people look good
• Spinners?
• Promoters ... or a description of 17-, 23-, 46- and 57-Across?