Must have well tuned midrange and lows for this to be epic. Pipe organ can go as low as 16hz and can potentially become mushy. Violins median range is 400hz
Mussorgsky: Pictures at an Exhibition; Stravinsky: Three Dances From Petrouchka
this is the pipe organ transcription.
Tchaikovsky's Violin concerto preferably Itzak Pearlman (my favorite violinist). Around 8 minutes of the first movement, there is a violin solo cadenza.
oPs edit: those are my top albums. yesterday and today was tchaikovskys swan lake, Russian philharmonic