Still vote even if it’s not for someone listed.

No. This is a losing strategy as long as there is more than one person on the ballot. The proper strategy is to vote for the best of the available options that have any chance of winning. That is the nature of the first-past-the-post single-member-district system we have.

If you have the opportunity to pick between the two candidates who have any chance of winning and instead choose any other option, then you have taken the vote that could have gotten you an option you would have preferred over the other option you would not have preferred and wasted it, thus helping the option you prefer less to win.