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Playnite
Video game library manager with support for wide range of 3rd party libraries and game emulation support, providing one unified interface for your games.
Playnite: The one with the most features and libraries available via addons and has a lot of options for customization. In my opinion the best one available for this purpose.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Heroic Games Launcher: Support is limited to Epic, GOG and Amazon but the advantage is that it can manage their games itself without the need of their own launchers. Doesn't have support for tags currently.
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Alfae: Supports a limited number of stores and doesn't seem to have support for filtering including tags.