MODOK can be funny, but it's not a constant. The humor depends on the specific comic issue and the context. Sometimes his megalomaniac tendencies are played for laughs, while in other instances, the focus might be more on the action or drama.
I don't think Darren Modok was featured in the comics. Usually, characters like this don't just pop up without notice or a lot of buzz among comic fans.
MODOK is not Yellow Jacket. They have separate identities and roles within the comic world. MODOK is known for its large head and mental abilities, whereas Yellow Jacket has its own unique characteristics and adventures.