The Mellotron...

[Rick and Roll]

Not only are there countless KC tunes as Dale says, there are countless tunes everywhere.

Anekdoten is one example that jumps out - every song they do is awash with Mellotron.

If I had to find a special song, believe it or not, Elton John's "Daniel" is one. It features a Mellotron lead that is note-perfect.