Possible Clues:

• John -, Regency architect
• "Who wants my jellyfish? / I'm not sellyfish!" poet
• "A Beautiful Mind" mathematician
• Comic poet Ogden
• "One-L lama" poet
• Maker of Ambassador autos
• Charlie, who challenged Jim Watt
• Regency architect from the north remains
• Poet known for inventing words
• Ogden who wrote light verse