Please list your "sheer myriad of similarities".
This is my list:
Successful businessman: Pl:No Tr: Yes
Successful motivational speaker: Pl: No Tr Yes
Career politician: Pl: Yes Tr: No
Womaniser: Pl: No Tr: Yes
Works behind the scenes: Pl: Yes Tr: No
Achieved power by numerous rounds of voting by very large numbers of people:
Pl: No Tr: Yes
Acheived political success against all odds: Pl: No TR: Yes
Even Trump's negatives are completely differ from Palpatine's.