Best PKMS sorfware for Collections

Hey! I'm looking for a software that can be a "card box" or a huge "garbage dump" for me. Specifically, I have the following requirements: - Must support Web Clipper. It's better to save in a "readable" format. I hate Web Archive because the original webpages often have a lot of messy content. It's better to be able to "annotate" on it. - Must support full-text search. - I hope it can support image OCR or audio and video transcription. - It's better to support tags. - It's better to support MarkDown. <But not necessary> - It's better to support cloud synchronization. - The design should be as refined as possible and have a well-polished user interface.

P.S.: I use macOS. I can accept no mobile version/paid software. I'm just curious if there is such software that meets my above needs. I've tried some apps so far, including Mymind, Raindrop.io, Reader and Evernote. And I'm trying Obsidian right now. But it seems to have some issues with the web clipper, and doesn't support Transcribe (I heard that i can install a plugin to get this feature, I just can't find it).