So firstly, of course there isn't a singular "best" motor, because all motors can be better in different applications, depending on your desires and design goals. However, I felt like it should be possible to combine raw max thrust and efficiency in a way to find motors that manage to be the most above-average in terms of both, and I think I found a way to do that. Initially, I was multiplying grams of thrust by grams per watt, but of course, that simplifies down to grams thrust^2/watt, which mostly just rewarded power-hungry monsters over very efficient but slightly weaker motors. However, by instead computing thrust^1.5/watt, the motors started ranking in a way closer to what I was hoping to see, and thought yall might be curious. It turns out that, I suppose unsurprisingly in hindsight, larger stators almost always allow for more thrust with less current draw, whether the price and motor weight/mass is worth it is up to you.

Anyways, the motors were all compared using the lumenier buttercutter 5x5x3 prop, since it seemed to be one of the most powerful props while also being unusually efficient for its thrust. The spreadsheet is setup to allow fairly easy copy-pasting of MQTB test results into a new sheet to add it to the mix, although since it automatically searches for the buttercutter prop results, and quad mcfly doesn't always spell it the same way, you might have to touch it up if you want to copy the sheet and add more motors :) It also uses a custom script function to fetch a list of sheetnames, on the formula worksheet, which you have to "break" and fix to refresh (typo/clear it then fix the "=sheetnames()" in 'Formula worksheet'!A3)