[CaptainBlackeye]

I found high quality scans of some of these logos:

Banjo-Kazooie with the N64 logo
https://twitter.com/Facts_About_BK/s...841602/photo/1

Banjo pointing off screen in a murky green swamp
https://twitter.com/Facts_About_BK/s...959656961?s=20

Mumbo doing Shaman magic in front of BK
https://twitter.com/Facts_About_BK/s...758961670?s=20

Full body images of Banjo-Tooie render
https://twitter.com/Facts_About_BK/s...603510278?s=20

This is an edit, but the Nuts & Bolts gift-wrapping Jinjos are from several smaller renders
https://twitter.com/Facts_About_BK/s...735497728?s=20

This one is also an edit (so probably not a rare render) but it's of the BK box art without characters
https://twitter.com/Facts_About_BK/s...229282304?s=20

High definition image of Banjo standing on a beanstalk
https://twitter.com/Facts_About_BK/s...513863171?s=20

This one is a restoration edit but it's a Banjo-Tooie render of Mumbo hogging the spotlight from BK
https://twitter.com/Facts_About_BK/s...094296579?s=20

This one is a unique render of BK hanging out with the Keebler elves
https://twitter.com/Facts_About_BK/s...579596289?s=20

Banjo-Tooie Premium theme revealed Grunty's unseen hand
https://twitter.com/Facts_About_BK/s...669578752?s=20

Captain Blackeye render without hair
https://twitter.com/Facts_About_BK/s...110614528?s=20

Nuts & Bolts world theme renders
https://twitter.com/Facts_About_BK/s...771269120?s=20

Beta Mumbo Token render
https://twitter.com/Facts_About_BK/s...320212992?s=20

Official german website animations
https://twitter.com/Facts_About_BK/s...054647813?s=20

Official german website animations (cont)
https://twitter.com/Facts_About_BK/s...074506755?s=20

Under utilized empty honeycomb render
https://twitter.com/Facts_About_BK/s...148924417?s=20

Under utilized honeycomb render
https://twitter.com/Facts_About_BK/s...216041472?s=20

Beehive enemy render
https://twitter.com/Facts_About_BK/s...925458945?s=20

Blubber's Gold render
https://twitter.com/Rare_Gamer/statu...721622528?s=20

Twinklies and Campfire render
https://twitter.com/Facts_About_BK/s...059712004?s=20

High definition unedited Grunty's Revenge cast renders
https://twitter.com/Facts_About_BK/s...366971906?s=20

Lunchables Jinjo House render
https://twitter.com/Facts_About_BK/s...657809410?s=20

Gruntilda running render
https://twitter.com/Rare_Gamer/statu...686637575?s=20

Mumbo pointing at the N64 logo
https://twitter.com/Facts_About_BK/s...864093184?s=20

High quality scans of the Grunty's Revenge transformations
https://twitter.com/Facts_About_BK/s...771859968?s=20

Back of Mumbo's head renders
https://twitter.com/Facts_About_BK/s...369555968?s=20

unused Mumbo timer from in-game
https://twitter.com/Facts_About_BK/s...528697348?s=20

in-game render shows a different rotation of Mumbo from the Banjo-Kazooie box art
https://twitter.com/Facts_About_BK/s...319070721?s=20

Enemy renders from Grunty's Revenge
https://twitter.com/Facts_About_BK/s...138144768?s=20

Mumbo Totems from Grunty's Revenge
https://twitter.com/Facts_About_BK/s...378543616?s=20

Jinjo renders from Grunty's Revenge
https://twitter.com/Facts_About_BK/s...292057088?s=20

Banjo's renders from Grunty's Revenge
https://twitter.com/Facts_About_BK/s...191174144?s=20

High quality Rareware logo from a press kit
https://twitter.com/Facts_About_BK/s...691404801?s=20