John Shea starred as Lex Luthor in the first season of Lois & Clark: The New Adventures of Superman, which was 1993-1994. He also appeared later on in the show as a returning baddie, but was in a lot of the first season episodes, being the rival of Clark Kent, fighting for the attention of the gorgeous Lois Lane. Lex wins Lois' affection (well, Superman got there first!) and during a very short dating process, Lex proposes and Lois accepts! However, Lois is oblivious to Lex's nastiness but, as they are standing at the altar, the police storm in and try to arrest Lex, but Lex jumps from his penthouse and falls to his death.
John Shea is the Lex I know from my childhood and I think his portrail of an evil Lex is captured prefectly. It's almost difficult to think that he's really not like that in real life! He was a true rival and enemy of Clark/Superman. I don't know him from any other shows apart from Lois & Clark, but I almost don't want to because he was so great as Lex. A truly talented and versatile actor who I admire. Also, he's handsome! Which always helps...