When one thinks 'shoujo', pretty sure nobody's first thought is Attack On Titan.
Gangs, violence, drugs, and a whole lot of tragedy. Not something most parents would think is the perfect thing to put in the hands of younger teen and tween girls.
Just reads like a typical vampire manga. The (extremely) light BL elements are barely noticeable, to the point that many readers don't consider it to be part of the genre at all.
An epic fantasy that people would never guess is shoujo. The characters are not trope-ish in the least, and the creative world-building coupled with excellent art make it a worthy read.
A lesbian relationship between adults is usually marketed for a male audience. Props to Wings magazine for recognizing that actual lesbians might want to read girls-love stories, too. I would have expected a josei mag before shoujo, though.
Episodic youkai series in the same vein as seinen-style supernatural manga like Mokke and Mushishi, or the shounen series The Morose Mononokean (which also feels more like a general supernatural series than shounen).
An AU manga of an extremely well-known shounen series running in a shoujo mag. Why? I don't know. Because reasons?
Nothing about this action-heavy apocalypse series screams 'shoujo'. Especially gory beheadings.
Starts out shoujo-ish with a princess seeking out a group of handsome male protectors. But Yona, the reincarnation of the powerful Crimson Dragon King, soon morphs from a damsel in distress to a young woman determined to learn how to protect herself and survive. The politics and battles of this fantasy are on par with similar pseudo-historical fiction in shounen magazines and is a great example of what shoujo can be when it breaks free of trope trappings and focuses on quality writing and world-building.