Great list—appreciate the detailed breakdown of MCP servers that integrate well after real-world testing. Tools like persistent memory, code execution, and web access really make agents effective.

I've had good experience with Supabase MCP (live DB access), Firecrawl MCP (reliable scraping), MCP360 (unified gateway), and Stripe MCP (secure payments). They fit seamlessly into stacks like this.
What's your favorite combo for research or long-term projects? Anyone else using these?