Some cool ones do support CLAP, such as:

    - Surge XT - open-source synthesizer with literally 10k presets built in: https://surge-synthesizer.github.io/
    - TX16Wx - free for non-pro use soundfont sampler: https://www.tx16wx.com/

While they may not do everything, to me as a novice, those two do cover a lot of ground for free.