Oooh I love this.
So, first of all, I'd like to promote Wondrous, a coming of age story with an aroace protagonist.
I absolutely adore this comic and how authentically it portrays the struggles of figuring out and coming to terms with your identity.
Then there's Black Wings, which has one of my favourite depictions of Lucifer. I'm very picky with my Lucifers. 
It's a fantasy story about a woman who goes to Hell and has to work for Lucifer, and I love the worldbuilding and character designs. Not only is the story and world really intrguing so far but the art is also a pleasure to look at. The world is so colourful and the characters all have unique, distinct and interesting (and diverse) designs.
A Tale of Two Shadows is another great one.
It's dark, it's gritty, it's intriguing, and the noir vibes. The film noir vibes. I'm a sucker for cool lighting and contrast-y art, and this comic is very noir-esque and contrast-y, and has a lot of interesting varied shots. I could totally imagine it as a movie.
Where The Flame Points is also one of my favourites.
I already loved The Unbearable Smell of Oranges (by the same creator), and this comic has a somewhat similar feeling to it, though it's a lot darker than Oranges. Again, the art is beautiful, and the story gives me the creeps, but in a good way. I also love that like in Oranges, the characters are very unique and interesting.
Lastly, a pretty popular one (but still one I wanna share) is Cunning Fire.
Look, I know I was pulled in because of gay witches. I am aware of that. But it's a very cool story and every character is incredibly well thought-out and either loveable or at least interesting and with understandable motives. Not just the gay witches. Also, the art. Look at that art. There's a lot to love about this one.