I read and re-read the following authors. Most of these stories have a component in addition to romance. Some of them have already been mentioned:

1. Nora Roberts / JD Robb
2. Amanda Quick / Jayne Ann Krentz / Jayne Castle
3. Linda Howard
4. Karen Robards
5. Karen Rose (more Thriller than Romance, tho)

By the way many of Nora Roberts' books have a Superman reference smile
wave

If she had to move heaven and Earth, perhaps come back to haunt Perry and explain the story after they'd killed her, she would do it.

Waking a Miracle by Aria