I’m pretty vanilla with my plugins:

• Omnisearch - disclaimer, I’m the main dev
• ReadItLater - a scraper to quickly save articles that I reference in my own notes
• Excalidraw
• Linter - mainly to automatically format my notes with a createdAt metadata and an h1 title
• Dataview - I don’t use it extensively but I have a few js snippets to query external APIs like Github or Mastodon

I try to avoid plugins that stray from “standard” markdown, to not rely on Obsidian.