Really ? I think Mandy has a unique voice, compared to the quite bland Kristen Bells. I only hope Kristen and Idina remain loyal to their characters and come back for voice work, like Mandy always does.
Comparing the other elements (Poss spoilers):
Flynn / Kristoff - Flynn. He's a brilliant character, and I love Rapunzel and Eugine together.
Maximus / Sven - Maximus. He's the best Disney horse ever I think; perfect blend of Sampson and Pegasus.
Pascal / Olaf - Hmm pretty much even split between the two. Olaf has some really heartwarming moments though, bonding the two sisters together…so I think he has the edge.
Gothel / Hans - Gothel. I don't think you can really do this one, as it isn't an even split of 'evil screen time' - Hans had a few minutes of screen time compared to Gothel being in the whole film.
King & Queen - Echoing the sentiment above, Tangled has this edge for me. You feel the pain and the emotion from the two of them when not a single word is said. Before they release the lanterns and the Queen is comforting her husband is just heart wrenching. Whereas Frozen's rulers locked their daughter away her entire life and had the indecency to pop their clogs
I think the story could have been more interesting if the parents still remained in the film rather than the classic Disney death of parents / broken family.
Thugs / Trolls - Thugs. I loathe the trolls.
Elsa is an amazing character, and totally unique to the Disney canon. I only wish she would have had more screen time!
… The Film That Gave Voice To A Whole Generation …