Okay - the answers:

As Trunks and Paulbot noted, the following toys (and their respective variants) all have both heroic and evil insignias:

G1 Punch/Counterpunch
G1 Doubledealer
Beast Wars TM2 Blackarachnia
Armada Sideways
Armada Wheeljack and
Cybertron Sideways.

The seventh toy on my list was the upcoming Animated Shockwave.

And the eighth (which was stupidly obscure but I included it just in case someone mentioned it) was the mail order Toys 'R' Us Robots in Disguise Scourge variant, which were Black Battle Convoy overstocks with US stickers – thus some of them had G2 Autobot symbols on the firing discs, but Decepticon symbols on Scourge's cab.

I'm actually surprised though if there aren't more in twenty-four years of Transformers, particularly when Autobots are recoloured into Decepticons and vice versa. Toys that came close to having both sets of symbols included the Autobot Cyberjets Jetfire and Strafe (which just had Decepticon insignias, except the Japanese versions which came with extra sticker sheets.) As I mentioned, toys like E-Hobby Overcharge and Gadep have also come with insignia sticker sheets. And Beast Changer has a half Maximal, half Vehicon symbol. Plus there's the occasional claim that people have bought Decepticon Transformers with Autobot rubsigns (and the other way round.) But are there really only eight molds with both heroic and evil insignias?

Anyway, Trunks, you named four - if you want to ask a question it's your turn.