fast-paced and powerful pieces
Beethoven: 5th symphony
Tchaikvsky: 1812 overture
Orff: Carmina Burana
Verdi:Triumphal March from Aida
Holst: The Planets (notably Mars)
Wagner: Ride of the Valrkyries
Puccini: Turandot act I
Adams: Shaker loops
the only fast-paced powerful song
I would recommend as a beginning is Erlkoenig by Schubert.
hopefully you'll come to enjoy less fast paced classical music pretty soon.