I am partial to Gaston440C.The best steel is the one that you like the most that works the best for you.
I could easily call 420HC from Buck the best steel.
What about JamielionsteelI am partial to Gaston440C.
What about Jamielionsteel
You gave a very narrow range of choices. None would be my choice for EDC. I'd select M390 or 20CV.
At least edit in a choice of "None of the above".
This.I lean towards the "there is no one correct answer side" ... it all depends what uses ... climate ... your sharpening skills etc ... out of the three you listed my personal preference would be M4 ... but that is what best fits my uses and my sharpening skills out of the steels listed.