Which would be the 5 biggest Transformers toy moulds?

[GoktimusPrime]

Energon Omega Supreme is tall and bulky but hollow. He's essentially a Mega Pretender shell for Energon Optimus. But you could easily reduce that toy down to the size of a Voyager and still maintain most of its play features.

And IMO Fort Max is more impressive than Gen. Metroplex, because Metroplex is a city for Cyberverse figures (e.g. Legion Class), whereas Fortress Maximus was designed for both smaller carded toys (re: the lift and central launcher/ramp) and larger boxed Autobot Headmaster & Targetmaster figures (re: the lateral ramps/launchers). He also has docking ports for medium sized figures (i.e. vehicles about the size of Gasket & Grommet). The mould worked really well for Car Robot/RiD with the central lift/launcher for the Spychangers and the lateral launchers for the Scout & Deluxe cars.

To be fair, Starscream did become extremely large after harnessing the power of the planet keys, but I agree that it should have been a voyager first and foremost, with perhaps an entirely new mould for a larger one.

Making him gigantic cartoon doesn't make the Supreme Class toy any better. G1 Starscream also became massively gigantic when he absorbed the power of the Underbase, but an oversized G1 Starscream (say at the same size as Fortress Maximus) would just be sucky. There'd nothing about that toy that would really justify its size (and price).

Is Primus that big? His planet mode is pretty small and I forget how much he expands. But I look at Overlord and Scorponok and in my memory Primus is smaller or same size.

Some height comparisons...
Gen. Metroplex: 58cm
Fortress Maximus: 55cm
Unicron: 39cm
Supreme Cheetor: 39cm
EN Omega Supreme: 37cm
G1 Scorponok: 35cm
Overlord: 34.5cm
Primus: 34cm

[Bidoofdude]

Making him gigantic cartoon doesn't make the Supreme Class toy any better. G1 Starscream also became massively gigantic when he absorbed the power of the Underbase, but an oversized G1 Starscream (say at the same size as Fortress Maximus) would just be sucky. There'd nothing about that toy that would really justify its size (and price).

But at least it has some type of reason, if any.

[Sinnertwin]

We shouldn't overlook Victory Saber (even though he's not a single mould) who is listed as being 39cm tall. Ideally, I'd like to get all of these figures & weigh them too.