Helena Bertinelli / Huntress

Post-Crisis / New Earth
2.  Dick Grayson / Nightwing  and Helena had back and forth sexual tension that culminated in a one-night stand. They also kissed on New Year's Eve when Gotham was declared a No Man's Land. On Post-Flashpoint Prime Earth, they were partners working for Spyral, and had a brief relationship following their departures.
 * 1)  Victor Szaz / The Question  and Helena had a love connection briefly, before his horror at her crime-fighting methods made him break it off.

3.  Catman  and Helena have apparently engaged in amorous connections now.

 

DC Animated Universe

 * 1) The  Question  and Huntress become a couple as Justice League teammates.

Arrowverse
After she returned to Starling City, she was all-the-more psychotic, even attacking his new girlfrieng McKenna. Returning for a third time, she was convinced by Laurel Lance to amend her ways, turning herself into the authorities.
 * 1)  Michael  - Helena, the daughter of crime boss, had a fiance before her father had him killed. She then decided to become the vengeful vigilante Huntress.
 * 2)  Oliver Queen / Arrow  - When Oliver was investigating her father, he was talked by him into taking his daughter out. They fell for each other, sleeping together. They later discovered the other’s identities as vigilantes. Although he himself used lethal force at the time, he opposed her using it as her “opening move.” This put a stop to the relationship, and essentially made them enemies, before she disappeared.