#lets get started

The first Emperor is Megatron, then he get's rebuilt by Unicron to become Galvatron (repping the OG show & movie).

Galvatron dies in The Headmasters, Lord Zarak (Scorponok's head) takes the role. His transtector gets destroyed, removing him from power as he goes into hiding.

Overlord is *not* an Emperor of Destruction in Super-God Masterforce, but they are the face of the Decepticon movement for Devil Z on Earth (until later). They don't get a crown, hence the covered face. Neat detail, right? *pats myself on the back*

Deathsaurus takes the title after Overlord (for a short while) was Emperor. He goes into hiding too, or dies. It's ambiguous.

Violengiguar is created by Dark Nova. They both got close to the title, but I'd say that Dark Nova was closest. The crown get's shattered as the title becomes meaningless... for a while. After this we get into the Beast Era.

Beast Wars Megatron and BWII Galvatron are shown together as they're on equal footing, for the most part. They both die.

Magmatron appears, battling a Unicron-Possessed BW2 Galvatron. This is taken from Beast Wars Neo :) Magmatron doesn't die, so there is no mark over his face. Honestly, he's the most different from the other Emperors, so good for him.

The clock turns back and we are met with RID01's Megatron, or Car Robots' Gigatron. Depends on what version ya watch. Either way, the Beast Era ends and the final part of JG1 begins with that last scene.