Here's my revised "heavy" bassist list. The first ever description of a recognized "heavy" band that I recollect was Mountain. Their style was typified as loud, direct, and with a new 1/2 time drum beat, for example on the song Mississippi Queen, the drumming had the main beat on "every other" beat, not every beat where you might expect it to be. Also similar was "Babylon" by Blue Cheer.
Then there was an 80's version of "heavy metal", or just plain "metal" bands. Then there were the "big hair" bands (yuck!).
Here we are:
1. Felix Pappalrdi, Mountain & producer of Cream
2. Dickie Peterson, Blue Cheer
3. Ron McGuinnet, Metallica
4. Michael Davis, MC5
5. Gordy Garris, the Frost
http://www.youtube.com/watch?v=6-OFTXOxD2E
Give this song a listen, it was quite exciting to see them open on this song live in concert. At the time the Frost was as prominat as Bob Seeger and Grand Funk.
Craig