Only a complete opera
But still, if one's looking for Scholl, I'd recommend this piece: "Cara sposa" from Handel's "Rinaldo".
Best rendition I've ever heard (and I have this aria in 6 versions). It's simply gorgeous.
And for nice heroic mezzos, try this: http://www.youtube.com/watch?v=7efM7qZFJYI
The above-mentioned J. Larmore singing Caesar's rage aria "Empio, dirò, tu sei" (with accompanying score). The last note was F3, mind you!!! (фа малой октавы, бл@, я охренела, когда подобрала её на фанно! Я это даже грудным регистром с трудом изображу.)