Most conniving
Else clues• Artful to the max
• Crafty to the max
• Foxiest
• Hardest to outwit
• Least candid
• Least forthright
• Least straightforward
• Like the best ruse
• Like the chief fox
• Like the fox among all beasts
• Maximally cunning
• Most artful
• Most cagey
• Most clever
• Most crafty
• Most cunning
• Most devious
• Most dodgy
• Most foxlike
• Most foxy
• Most furtive
• Most guileful
• Most roguish
• Most underhanded
• Superlatively foxy
• Superlatively surreptitious
• The most conniving
• Tops in cunning