Tony’s is good, and Lindt is good. Both are more expensive and fancy than the usual bars tho and its unfair to compare them with the rest (like putting a real restaurant on a fast food ranking).
standard Kit Kats are awful.
I like the big Reese cups with the caramel or mashmallow layer. Aero bars are good, anything cookies and cream, Kinder bueno, Crispy Crunch, flake bars. Most Canadian version of chocolate bars are better than the American versions tbh.