I'd still say Goku wins but let's be fair to Obi-wan here, in Resurrection of "F" Goku got beaten by a laser beam. In the movie version, the one Akira Toriyama had direct involvement in (i.e. the version I refer to for canon), Goku was in Super Saiyan Blue when the laser kicked his ass. Based off that, it's fair to say that a lightsaber could likely decapitate Goku so if Obi-wan took him by surprise he could win against Goku.
But that's the only way, I doubt Force powers would work on Goku, in Dragon Ball it's kind of been established that hax doesn't work if the power gap is too large. Chiaotzu's telekinetic abilities didn't work on Nappa, and in the manga Hit's time-skip is negated when Goku goes Blue.