I don't know which tier Mola Mola and Grimm Audio are in, but they are not well represented on WBF and they are innovators. I keep thinking it is the pricing - not the uber level (which some assume means they cannot be very good), but more expensive than many interested audiophiles can afford.
IMO we should be bored with why the alternative brands do not get proper recognition. I have respect for the brands you refer because of their transparency - I know technical details about the products, their development, who designs them and they supply samples to be measured in reviews. Although I am away from the places they are developed I have met with their designers and people from their factories in my country, and they also answered my tricky questions.
Can you tell me what are those real innovators in the 2nd and 3rd-tier brands? As far as I see since the appearance of digital he have just iterators in the high-end - surely some brilliant iterators, but nothing else.
I agree the phrase innovator should be used sparingly. True innovation is not easy to achieve or even identify. Here are some examples I have immediate experience with. My list is not meant to be all-inclusive, merely to highlight past and present innovators who, in my view, changed the game I am familiar with after five decades of immersion in high-end.
Earlier Innovators:
1. Bill Johnson ARC (various amplifiers)
2. Dan D'aGostino, Krell (KSA amplification)
3. Nelson Pass (First Watt and other designs)
4. Dick Sequerra, (Marantz 10 B and Sequerra One)
5. Stu Hegeman, HK Citation 1 & II and Hapi preamplifier
6. Peter Walker Quad
7. Tom Colangelo and Paul Jayson Cello (especially the Audio Pallette)
8. Jim Winey, Magnapan Tympani IVs, and other designs
9. Jason Bloom, Apogee loudspeakers
10. AJ Conti, Basis Transcendence table and Superarm
11. Albert Von Schweikert, VSA various designs
Modern-day Innovators:
1. Emile Bok, Taiko and team for XDMI
2. Angus Leung, WestminsterLab for the Rei amplifiers (note I represent them in North America)
3. Aki San for his optical phono cartridges
4. Sven Boenicke for his exceptionally different approach to loudspeaker design
5. Luca Chiomenti, Riviera amplification
6. Fulvio Chiappetta, Alieno Audio hybrid OTL amplification
7. David Berrning (always)
8. Ivo Sparideans, AEquo Audio, for his meta metal cast loudspeaker enclosure used in the forthcoming Adamantis loudspeaker
9. Peter Lederman, Soundsmith for his strain gauge cartridge
10. Mark Dohman, various original turntable designs, including the CONTINUUM and Helix One