Great idea! Piano demos are my favorites!
As you suggested, definitely Forest of the Black Roses and POTU...
And I agree with the others on China Doll and Blue Water as well...
I would also suggest some from my own piano playlist:
Gypsy- slow piano version is a must!
After the Glitter Fades piano demo (Stevie hits pretty high notes on this one)
Gypsy Beggars
Forsaken Love - piano demo!
The Tower (of course!)
Beautiful Child demo - rock n roll lullabye
Christian (Spinning Wheels)
Knocking on Doors
Bella Donna - piano demo
Belle Fleur - piano demo
Sisters of the Moon - piano demo
Smile At You - (mostly piano - maybe some guitar enters later)
Rock a Little - piano demo w/ Mick
Sara - Cleaning Lady Version
The Nightmare piano demo - 14 mins + long, but still kicks ass!
