Bewildered - good. Like you're lost in a forest.
Befuddled - good. Like someone spiked your eggnog.
Bemused - bad. This word should mean the same as 'amused'
Perplexed - good.
Puzzled - simple. Everyone loves puzzles.
Baffled - It's like being beaten senseless by a wiffle bat
Nonplussed - bad. It seems like it should mean the opposite.
Disorientated - why not just disoriented?
Mystified - great
Flummoxed - great if your character develops a stutter
Bamboozled - sounds like you're the victim of a con artist
Discombobulated - six syllables is excessive. See 'Disorientated'
Wildered - for some reason it means the same as 'bewildered'
Confounded - sounds like a Hogwarts curse
Disconcerted - you have IBS and the restrooms are labelled in a foreign language.
Astonished/Astounded - confused + amazed. Two adjectives in one word!
Stupefied - stupidly confused
Stumped - low stakes. Confused during trivia night
Muddled - okay. Bonus usage: this is how you infuse your cocktails with herbs, like mint.