The leader of the Autobots from the 1984 Transformers was Optimus Prime.
For 2004, Hasbro/Takara have crafted the Masterpiece version of Optimus Prime to commemorate the 20th year of Transformers:
You wouldn't defy him after staring into those eyes: (missing photo)

His not so perfect truck mode:
The transformation is a bit tricky and non-obvious for me but some of the little transformation tricks are very clever. This is the most cartoon accurate Optimus Transforming toy ever created. He even comes with a mini-megatron gun and the matrix of leadership.
For 2004, Hasbro/Takara have crafted the Masterpiece version of Optimus Prime to commemorate the 20th year of Transformers:
You wouldn't defy him after staring into those eyes: (missing photo)

His not so perfect truck mode:
The transformation is a bit tricky and non-obvious for me but some of the little transformation tricks are very clever. This is the most cartoon accurate Optimus Transforming toy ever created. He even comes with a mini-megatron gun and the matrix of leadership.