Go with Pixel Experience Plus . It is the perfect balance. Your Galaxy J8 will feel like a Pixel 4a. The UI is clean, the gestures work perfectly, and you get unlimited Google Photos storage (if you spoof it).
For the Samsung Galaxy J8, installing a custom ROM is a popular way to bypass the limitations of its aging hardware and the discontinued official updates that stopped at Android 10 . Custom ROMs often provide better performance by removing heavy Samsung "bloatware," improving battery life, and offering newer Android versions . Top Custom ROM Recommendations samsung galaxy j8 custom rom better