Underappreciated Royal Navy leaders and battleships

Which Royal Navy admiral and ship class are underrated?

The selections are the King George V class, Admiral Duncan, and John Cunningham, whose record is often eclipsed by the more famous Andrew Cunningham.

The King George V-class battleships are heavily underrated, while Admiral Duncan receives too little attention among Age of Sail commanders. For World War II and its aftermath, John Cunningham was a capable officer and First Sea Lord whose identity and work are frequently overshadowed by Andrew Cunningham.