03/22/2017 12:08:00 PMObituaryGregMack'80AlumniobituaryAlumni Greg Mack (’80), Denison :: He had a passion for watercolor painting and marketing. He worked at an advertising company in Denison, then moved to Fayetteville, Ark., where he established Taylor Mack Advertising. Upon retirement, he moved back to Denison and opened Gyst Art Gallery to help local artists display their talent.