Handel’s Messiah–it’s a pity we do it mostly at Christmas; it’s very much an Easter piece. A few especially Easter-y excerpts:
The St. Matthew Passion–The Gardiner recording is perfect, if a little cool. My favorite is this Herreweghe recording, which is less fussy about historical performance practice and less restrained than the Gardiner. (And makes the mob choruses truly scary.) There’s also a good performance serialized on youtube, with the Amsterdam Baroque orchestra. Start here.
The St. John Passion–smaller and sweeter than the Matthew. This is the one I listen to every year without fail. Again, Gardiner and Herreweghe are the go-to recordings, although I’m starting to really like the Bach Collegium Japan’s version, conducted by Masaaki Suzuki, which (oh wonders of the internet!), you can hear and watch on youtube, starting here. My favorite chorus, Ruht Wohl, is here, starting about 2 minutes in.