What are the former villains that went legit and became good guys, never to return again (apart from maybe an instance or two of backsliding by a bad writer)?
Just off the top of my head:
- Hawkeye
- Quicksilver
- Scarlet Witch
- Black Widow
- Black Knight
- Wonder Man
- Rogue
- Venom
- Screaming Mimi (now known as Songbird)
- Beetle (now known as MACH)
- Emma Frost
Honorable Mention
- Sandman (went legit throughout the '80s and '90s, and was even an Avenger, but eventually went back to villainy)
Anyone else to note?
Also, we can include honorable mentions for villains who had a long streak of being good, before permanently going back to villainy, just as an extra note.