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This is tricky.
Yamauchi and Iwata both led Nintendo through good times, (NES/SNES/Gameboy/Wii/DS) and bad times. (N64, Gamecube, Wii U) Their highs were magnificent, their lows disastrous.
Kimishima wasn't really around low enough to be as noteworthy, though he definitely deserves props for managing the very successful launch of the Switch. Furukawa has presided over the most successful period in the company's history, but the real test of his leadership will how he manages the transition to the next generation; if Switch 2 is another smash hit, his position as one of the greats will be cemented.
It's worth noting that a lot of what Kimishima and Furukawa achieved with the Switch was set in motion by Iwata before his death, so he deserves a lot of the credit for it as well.
