A Question of Loyalty

[Tuor in Gondolin]

The question is this: if Orcs, be it just one, or a band of them, had actually held the One in their hands, would they have returned it to Sauron? Could they have done so, being already in the mind of evil and seemingly specially vulnerable to lust of it?

Certainly Grisnakh wouldn't have returned it. But I think trying to use it
would have been like Frodo trying it on Mount Doom.

Letters #246
Sauron sent at once the Ringwraiths. They were naturally fully
instructed, and in no way deceived as to the real lordship of the
Ring... if he still preserved some sanity...thery would simply have
waited. Until Sauron himself came.

It would be interesting if Grishakh fled to the northern Misty Mountains
and began to experiment with understanding and wearing the Ring.
Would Sauron have been distracted from attacks by his armies, have
sent the nazgtul, have taken the dangerous tack of going north
immediately with some of his forces or alone?