rectitudinous

/ˌrɛktɪˈtudɪnəs/
adjective
  1. Having or showing strong moral correctness; extremely honest and upright.
    • The rectitudinous senator refused to accept any campaign donations from questionable sources.
    • Her rectitudinous approach to business earned her the respect of even her competitors.
    • Some people find his rectitudinous attitude annoying, but others admire his principles.