In Force Heretic II (NJO era) we find out that the governor of Bakura, Moliere Cundertol—top 5 Star Wars name by the way😂—got enteched and transferred to an HRD (human replica droid) made in his likeness. He retained his mannerisms, personality, memories, everything that made him who he was.

This doesn’t really answer the question you posed, but it is about as close as it gets when it comes to enteching with the intent of “spirit transfer”