Journalism? English? Advertising? Marketing? Psychology?
Marketing is the best of all these for making oneself attractive to employers, from what I’ve seen. I’m not an advocate of minors, preferring to advise people to take electives in useful areas that become identified during your undergraduate time. You can just point out any pertinent electives to prospective employers. By all means take some writing courses if needed to become a good writer. Competence in using computers is, of course, essential.