"stood out the most" is a correct and usable phrase in written English.
You can use it when you are trying to emphasize something. For example, "Of all the charities I researched, the local food bank stood out the most as the most effective."
The one that stood out the most was low-level drug offenders — possession of marijuana or drug paraphernalia.
But, of all my uncle's eccentric and belligerent characteristics, the one that stood out the most for me was his love-hate relationship with the West.
The scene that stood out the most, that I found both horrifying and enthralling, was the skeleton fight at the end.
Amid the immediacy and spontaneity of the dancers — as amid the company's later performances I saw — Bradon McDonald stood out, the most in-the-moment of them all without upstaging anybody, a marvel of focused engagement, the embodiment of the music's impulse, always performing as if animated by a brimful inner life.
Speaking again this past April at the 2017 edition of the conference (dubbed F8, not to be confused with the latest Fast and Furious movie), Cabral highlighted the three products that stood out the most: the Imagine Vision Z Cam V1 Pro, Onsemi CKT 360 Endeavor, and the Kandao Obsidian, the latter of which was designed and built in Shenzhen by a Chinese start-up.
But it was a loss that ended the year that stood out the most to coach Shawn Nadelen.
The final games stand out the most.
But probably my first, Montreal, stands out the most.
The team that stands out the most is the Los Angeles Lakers.
But it is his oddly bulky, oversized backpack that, in terrible hindsight, stands out the most.
For Mr. Hilton, Crowdpac is where his conservative leanings stand out the most.
