Which group of tenses indicates that an action was or will be completed before another time or action?

The answer is future tense.

According to Oxford Dictionary, future tense is "a tense expressing an action that has not yet happened or a state that does not yet exist."

Past tense happens in the past, present tense happens in the present, and future tense happens in the future.

now theres some gals in the house and the brung some owls in the house...