During his political life, Pronk was known as principled politician.
In that sense, it is quite possible to be a "principled" politician - if that was not so, then (arguably) all politicians are opportunists.
Pozderac cannot be viewed as a movement leader but as a patient and principled politician who saw the opportunity for change by working within the system.
Ron Paul is an honest and principled politician.
He is considered a politician of old block, a non-corrupt principled politician.
More likely he was a principled politician, but not so principled as to be unelectable.
Ståhlberg had quietly favoured Ryti as his successor, because he considered Ryti a principled and unselfish politician.
An Episcopal priest with a long commitment to public service, Mr. Danforth was known in the Senate as a principled politician and moderate conservative.
President Uhuru Kenyatta sent condolence to the family eulogizing kilonzo as "one of the country's most brilliant minds, a principled politician and a renowned lawyer."
Sid Handleman was a very principled politician, and he was always willing to fight for those principles in any forum.