Big Issue | FL is a total badass and you get a great role-reversal with the successful FL helping out an ML who's basically homeless and an addict. Romance is subtle but nice.
He is Psychometric | FL is highly intelligent, ML is cute and a bit of an airhead, and she's his unofficial "tutor" so, something of a superior, at work.
Hyena | FL is an unorthodox badass (something of an anti-heroine), ML is a bit awkward, FL ends up becoming the ML's superior at work (team leader).
Jugglers | FL is capable and funny, ML is actually her boss BUT she's his landlady, so there's an interesting balance of power between them, ML is SUPER awkward and often misunderstood (a closeted geek).
Oh My Venus | FL is smart and capable, she hires the ML to be her personal trainer.
Terius Behind Me | FL is resourceful and smart, she hires the ML to be her children's nanny (but the ML is actually a secret agent). Very subtle romance in this one, but cute nonetheless.
The Last Empress | FL is a total badass (she grows into her power); smart and resourceful. The ML works for the palace and becomes her bodyguard.
Voice | FL is a badass and the ML's superior at work, however, there is no romance in this one.
The Legends - The FL is a badass for most of the drama (she loses some or all of her abilities at certain points, but never her confident / badass personality) and she establishes her own sect where she is the sect leader and the ML is a low-level subordinate for five years. Later on (after the FL dies) the ML becomes sect leader, and when the FL is resurrected he is her superior, but he is always submissive to her so when she (in her new body) reminds him of herself he let's her get away with pretty much anything and when he realizes that it's actually her he de facto lets her be the boss again. They also definitely meet your cool / badass FL and cute / awkward ML request.
The Masked Lover - The ML is a cop but he goes under cover and pretends to be a rookie who wants to be in the mafia. The FL is an architect who fills in for her sister who is a mafia boss who's trying to go legit. The FL isn't as badass as her sister, but she does learn to tap into her inner badass a little bit. The ML isn't naturally awkward or cute, but his undercover role has a bit of that dynamic.
Bloody Romance - The ML is the badass and the FL is... not. But he is essentially her servant and bodyguard and is completely subordinate to her.