Who did Spock mind meld with before "Dagger of the Mind"?

[JonnyQuest037]

Didn't Spock do mind melds in Discovery?

Yes, but the entire point of this thread was to speculate on who Spock might have melded with before DSC and SNW started rewriting Spock's history.

*(Yes, I know that Spock mind melds with Kirk in an episode of Strange New Worlds, but let's disregard that for the purposes of this discussion. I'm interested in who Spock might've mind melded with before the modern continuity overwrote the old one. Back when Spock was a taciturn and mysterious alien who only revealed personal details about himself to his shipmates when absolutely forced to. Who did THAT guy choose to meld with?)