Question: Who has played in the most bands: Seo Eunkwang or Keith Buckley?
Sentence (from "Seo Eunkwang"): Seo Eun-kwang (; born November 22, 1990), also simply known as Eunkwang, is a South Korean singer, entertainer, and the leader and main vocalist of the South Korean boy group BtoB.
Relevant evidence: Yes