Beowulf

Beowulf is an Autobot Pretender from the Japanese cartoon portion of the Generation 1 continuity family.

Also, he fought a bear.
(Beowulf is the second from the right.)

Beowulf is an arrogant warrior, and part of Marduk's Pretender team.

Fiction

Ask Vector Prime

After MegaZarak sent Fenris and his team to Beast to steal the Ultra Matrix, Fortress responded by reverse-engineering their Pretender technology, and sending four warriors, including Beowulf, to stop them. Though the Destrons managed to steal the Ultra Matrix, Beowulf and his teammates were able to defeat them; in gratitude, they were given the Ultra Matrix by White Leo. Ask Vector Prime, 2015/09/30

Notes

• Beowulf and the other Pretenders of Primax 304.25-P3 Zeta, were based on unused concepts seen in Transformers Generation Deluxe.
• Beowulf is the titular hero of the famous Old English epic poem.