For me, the best combination of technologies to create any web application is:
No need more.
Rails has everything you need https://rubyonrails.org/everything-you-need/
Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker.
PostgreSQL is the World's Most Advanced Open Source Relational Database
Tailwind CSS a utility-first CSS framework for rapidly building custom designs.
What is yours?