Here are a few good media players that may interest you -
VLC Media Player
This is one of the best open source and free media player available for Windows. It supports almost all formats. It also has streaming service. It has basic and simple UI. Yet, if you are bored with, you can download additional themes from the official website.
Another free software which is in fact an acronym for Media Player Classic- Home Cinema. It simple and lightweight. It has support for all codecs and formats. It also lets you install additional themes and skins.
This is one of the best applications available for playing media files. It supports 3D, 4K and UHD. You can set up libraries of your video files. It also supports DVD playback.
If you want high quality video playback experience, DivX Player should be your first choice. It supports HEVC playback and also UHD videos. You can stream the videos to any device that has DLNA support.
Live....and Let Live!