But none of the others even when The Doctor diddybops around in time including like, before they were destroyed?

The Rani - renegade Time Lady (1985)

And I think there was another Time Lord(?) during Patrick Troughton's era who I seem to remember tried to trap him in his TARDIS by stealing something to fix his own.

Found him, The Monk - otherwise known as Mortimus, another renegade.

There was also Romana, (who regenerated), and Susan, (his granddaughter from the first episodes).

You could possibly include Jenny, (The Doctor's Daughter episode).

I forgot Romana    And now it appears that The Master has...  undergone gender reassignment...

That gives me an idea how to totally eliminate The Doctor's job security.  Using the regeneration gimmick they could replace an actor playing The Doctor.  But one "better."  Have it so like the Tardis, The Doctor could look and sound like anyone.  If the talent takes too long a tea break, Zap!  Now he's another actor who was passing by on the lot.  That will keep them in line!