Lowlight photography: Pixel or Huawei P/Mate series.
I was using the Honor View 10 (Huawei’s sub brand), and even without OIS, its night mode is quite amazing. I would imagine the P/Mate series will perform even better with OIS.
Casual point n shoot daylight photography: pixel or latest iPhone
Their smart/auto HDR are simply magic, especially for those coming from regular digital camera that used to do a lot of post processing to regain highlights and/shadow details. I’ve seen images from the iPhone XR taken without any edits, that would’ve required me to use Lightroom to achieve similar dynamic range if those images were taken with a regular DSLR.
Video: iPhone.
For video, iPhone is still the king. And there are actually real pro level video apps on the iPhone, namely Filmic Pro. Video on Android phones is a mess. Even the flagships like Samsung don’t implement the Camera API from Google properly, it’s just ridiculous.
Samsung is just a hype at this point. Only get Samsung if you are a fan of the brand.