For example, if you like the sound, you might choose a Hebrew name that sounds similar. If you know the meaning or etymology of Harvey (which is uncertain and debated, but sometimes associated with "war-like" or from a place name), you could find a Hebrew name with a similar meaning.
Ultimately, the best "Hebrew equivalent" of Harvey is subjective. You could present this challenge to a Hebrew speaker who is comfortable with name selection and they may offer suggestions.