Deceptive Love: Manipulators & Pawns

Hall of Fame Awards for best master manipulators in romance, the majority from titles I've seen. Manipulation must involve a lead, both leads, or from a main antagonist toward a lead, with romantic intent. Manipulation cannot be unintentional, such as mistakes/goofs or innocent white lies, and must involve advance planning and intent to romantically deceive for the purpose of personal gain, usually revenge or romantic. This list omits 99% of regular ol' cheating, unless it involves deception above and beyond the call of duty.

 I will not note who, how, or success/fails to avoid spoilers.