The U.S. was not exactly a breeding ground for audio creativity on the C64 (or any other platform, for that matter).
I agree with that. Europeans almost always make better music than Americans.
It's also a matter of timing. My favourite 8-bit games were 1985 and earlier. The C64 Euro scene was only getting started in 1986 at a time when Atari was dead in Canada and the C64 was on the way out.