Jeremy Evans[0]: He has made a lot of useful tools for developers who want to implement a minimallistc approach to web development on Ruby.
His probably most well-known projects are Sequel[1] and Roda[2], but he has frequently contributed to many important projects and Ruby[3] itself focusing on simplicity and performance that impacts all the ecosystem.
Edit: Also forgot to mention, I really like his approach on developing frameworks with great extensibility and modularity leveraging Ruby's capabilities without 'magic'.
His probably most well-known projects are Sequel[1] and Roda[2], but he has frequently contributed to many important projects and Ruby[3] itself focusing on simplicity and performance that impacts all the ecosystem.
0: https://github.com/jeremyevans/
1: https://github.com/jeremyevans/sequel
2: https://github.com/jeremyevans/roda
3: https://bugs.ruby-lang.org/issues/12024
Edit: formatting
Edit: Also forgot to mention, I really like his approach on developing frameworks with great extensibility and modularity leveraging Ruby's capabilities without 'magic'.