While "Final Space" does have its share of well-known voice actors, the series also features plenty of less well-known talent. In fact, one of the reasons Avocato is such a memorable figure in "Final Space" is arguably the fact that his classically heroic voice isn't immediately recognizable from a gazillion other high-profile projects.
Avocato's voice actor is Coty Galloway, and he's known for his work on YouTube and short films. He's appeared in projects like Corridor's "Super Heroes vs Game Heroes" short, and the award-winning crime short "Beverly." He has also written, directed, and procuded numerous short films.
Galloway's acting roles have skewed toward live-action and short-form, and while you can't see his face in "Final Space," Avocato is quite easily his longest-running role. Apart from the Ventrexian, he also provides the voice of Viro and a Tera Con officer in the show's earlier seasons, as well as additional voices for two early episodes.