I don't follow the market much, but regular Kenner is without a doubt going to be the cheapest.
From the past observations I would imagine it would be (as a general rule but of course character and cardback combo plays a big part):
This list may be incomplete as I am recalling cardbacks off the top of my head.
This may be a bit out of order. For instance some poch figures only one figure exists on that cardback, but the glasslite vlix sells for more than I have seen any poch figure command and there are around 25 of them that are known. Not even sure how many top toys carded are out there, but the commons are out in large numbers so they sell for way less, so Vader and stormtrooper sell for less than some Kenner, but a Luke Jedi would go way higher. Again cardback combo and which character and even figure variant all play a large part in all of it.