1.)Harry F. Olson, engineer at RCA Victor. Awarded 100 +patents including the 44 and 77 series microphones. Loudspeaker baffles anyone?
Yes, the criticisms of Dynagroove were certainly warranted. IMO, it was simply a serious attempt to improve the listening experience for people with less than ideal audio equipment. (His book, "Music, Physics and Engineering" is available on Abe Books for $6.16 w/free shipping.)
2.) Ed Miller & John Wood (Sherwood).