minimalist

/M IH1 N AH0 M AH0 L IH0 S T/
noun
  1. 1

    One who believes in or seeks a minimal state; one who seeks to minimize or reduce to a minimum.

    โ€œHe's a minimalist: when it comes to formal processes, the fewer the better.โ€

adjective
  1. 1

    Believing in or seeking a minimal state; seeking to minimize or reduce to a minimum.

    โ€œI am sure such a minimalist style of furniture would never fit well with my packrat nature.โ€

Source: https://en.wiktionary.org/wiki/minimalist