Possible Clues:

• One of Shakespeare's kings
• King in a Shakespearean tragedy
• "Sanford and Son" co-producer
• Sitcom king Norman
• Sovereign's appreciation of humorist
• Norman who produced "All in the Family"
• Poet spotted in meadow by river
• Writer who coined the term 'runcible spoon'
• The Duke of Albany's father-in-law
• Role at Stratford as writer of comic verse