Possible Clues:

• Rocker Graham
• He sang with Crosby
• ''I'm a Stranger Here Myself'' poet
• Charlie, who challenged Jim Watt
• Graham of The Hollies
• John -, Regency architect
• Architect of Buckingham Palace, d. 1835
• ''Reflections on Ice-Breaking'' poet
• 'A bit of talcum / Is always walcum' writer
• "Reflections on Ice-Breaking" poet Ogden