Im using LibreELEC with Raspberry PI 3.
I tried the many raspberry pi OS out there for media and file sharing use, and this is currently the best of the bunch.
Very stable ultra lite OS without an OS GUI of its own, but it does not need it as it boots directly into KODI. OS setting can be managed from within KODI settings or one can install a add-on CLI. But really if you need this you can use the SSH functions from you tablet, notebook for remote setup, monitoring and upgrading.
For remote control of the media player a wifi keyboard is good or better use your smart phone with free app from play store work great. I use it both as Media Player and file server using the build in samba functionality. It can play HDMI to TV and stream to one device concurrently without any stalls. Just a note the wifi file share speed is not great but this is a hardware limitation that I bypassed using a ethernet cable between device and router.
The security is a bit weak for example on SSH the root password is preset so switching on SSH has its risks albeit low. It does however allow the installing of add-on apps like OpenVPN so if you are streaming from a not to legal site your ID id hidden.
LibreELEC is a fork from OpenELEC which seems to have stalled in development for over a year, although I hear things have started again.
LibreELEC has a great team that keeps the linux Kernel etc and Kodi versions current. This distro is fit for purpose but if you want a full OS for raspberry pi then look elsewhere.