Related Clues:

• Quintessential
• Blue ribbon-worthy
• Ten, so to speak
• "Father Knows ___"
• Worth a 10, maybe
• A 10, by some standards
• With Banting, insulin finder
• Often unattainable perfection
• Film-award word
• Insulin co-inventer
• Best-possible
• Part 6 of our Christmas Carol
• Without a flaw
• Letter ender, perhaps
• Part of BFF