Signal Lancer the Mighty Adventurer!
After being stationed on earth during Cybertron/Galaxay Force Signal Lancer joined the crew of Metroplex's ship to travel the universe. Some time after that he found his way to the Axiom Nexus (a hub for travelers from other dimensions and one of the oldest dimensions in the Transformer's multiverse).
From there his story gets a bit fuzzy, but it is believed he travels through time, space, and dimensions fighting for justice! He is one of the greatest Transformers the universes have ever known!
A quick sketch of one of my favorite Autobots, just done for fun.
Signal Lancer (C) Takara Tomy/Hasbro