Both characters are highly respectable. They were captains of a station whom people looked up to.
Sheridan was as handsome as Star Trek's Captain Kirk but he was not a womaniser like Kirk. President Sheridan has none of the bad habits of President Kennedy or President Clinton which drove their wives mad. Sheridan was a one-woman man throughout to Delenn. He did not give in easily to sexual temptation when he was seduced once by a Earth political officer. He also seemed like a devoted husband to his second wife, Anna. He seemed like a man of good husband material. He is a trophy husband for any woman who captures his heart.
Lochley is probably the most gorgeous Captain in Science Fiction history. Enough said. Sheridan divorced her after 3 months of marriage. She is a trophy wife for any man who marries her.
Why did they separate?