Nimoy is a bit of a knee-jerk at the moment, but including him is like including Spielberg, as it is a big name but has had limited involvement compared to other people in that area (in the case of voice acting, Nimoy was two short roles, while there are dozens of VAs who have done more for Transformers over the 30 years).
This was a list of people I think should have some acknowledgement that I posted up on TFW for "Pete's topic", noting that some polarising/infamous people here shouldn't win a fan-vote or be inducted, but should be recognised as a catalyst at one time that was instrumental for the rise of popularity of the Brand to the point that we wouldn't get to the point of having Movies if they hadn't been involved with the Brand.
Frank Welker (one would expect him be inducted soon, being equally, or more significant to the Brand and fandom than existing inductees Peter Cullen and Chris Latta, because he brought to life by voice, more iconic characters than those two combined),
Aaron Archer (creator of the Unicron Trilogy era),
Eric Siebenaler (designer of Animated & Classics toys),
More of the TakaraTomy toy engineers, especially current ones like Kobayashi, Hasui and Yuki (but too many to mention... they are the brilliant minds who do the hard work of creating/engineering all the parts for the convertible toys from Hasbro concept drawings, but Hasbro people are the ones most known and credited - so this would be a great way to make them more well known in the fandom and get the credit they deserve),
Derrick Wyatt (creator of Animated),
Bob Forward & Larry Ditillio (writers/creators of much of Beast Wars & the first official people to interact with fans during their run that led to fans shaping the direction of the series with Gen1 references and taking on Furman and Yee in the 3rd season),
Don Figueroa (War Within story and designs spawned toys and an ongoing "Cybertronian" Style since then),
Other long term or iconic artists (like Andrew Wildman, Geoff Senior, etc.),
John Barber (driving vision for almost a decade of Transformers comics),
Pat Lee (unfortunately, he was a catalyst for the pre-Movie surge of popularity in the Brand by the general public with their record-breaking comics, justifying the investment in a live-action movie... so should be recognised with a nomination, but NOT be inducted),
Jon & Karl Hartman (for creating the legacy of BotCon),
Glen Hallit (despite how it ended, he was still a driving element of BotCon's middle-era expansion and it's success in the fandom during those years),
Brian Savage (good or bad, his company kept BotCon alive after 3H),
Pete Sinclair (the Transformers fan on staff during the FunPub era, responsible for much of the last 10 years story and toys/characters),
Ben Yee & Dave Van Domelon (the people who helped get the "trukk not munky" fandom to accept Beast Wars in 1995/1996),
Greg Lombardo (the face of Hasbro to the fans during much of the FunPub BotCon era),
Raksha (for bringing balance to the allegiances when the fandom was almost all pro-Autobot in the early years of the online fandom, before Beast Wars).
Unfortunately, some of those are now almost mythical in the fandom as being long gone in the fandom... but still should be recognised for what they've done or contributed to Transformers and/or the Fandom, even if it is like "posthumously".