Action Drama Romance

Just finished Healer and my god it was phenomenal. 

Can I get a list of shows with these genres? (Action, Drama, Romance) Can have others, but mainly are theses.

No historical drama please.

Would like happy endings.

Bonus if there's a love triangle between the male lead/female lead/second male lead.

Bonus if she likes the second male lead first, but then falls for the male lead.

I'm glad you enjoyed Healer. It's my all time favourite drama. Based on everything you've mentioned, I recommend Just Between Lovers. It's the only other drama I've given a 10 to, and I think it meets all your criteria (except maybe the love triangle dynamic - the FL doesn't really have romantic feelings for the second lead in the present, but in the past when she and the ML first meet she did have a boyfriend and that remains sort of relevant for a while in the storyline set in the present). It has some similarities with Healer (the past story being revealed along with the present and the leads having a very significant past connection, the issue of corruption, the ML coming to work in the same place as the FL, the ML putting up a wall with the FL because he feels he's not good enough for her or will hurt her, etc.), but it's a little bit heavier with the melodrama. So be prepared for that and I think you'll really enjoy it.  

Pretty much all of your criteria are met in: 

- Time between Dog and Wolf: I know, it's old, but it's very, very good. Trust me, at least watch a couple of episodes. 

- City Hunter: I love almost everything about this drama. I even prefer it over Healer, but that's a matter of opinion. Strong female lead, double identities, loads of action and drama, you name it.... 

- Yong Pal: Starts out as action/medical, then turns more into a revenge drama. I loved it, though.

A bit less action and more mystery, but also great:

- I remember you/Hello Monster: The romance is much slower in this one, but they share a special connection. Fantastic drama. 

- I hear your voice: Noona romance; mystery/law but also a bit action.