The very curious Lee-Teng Hui who seemed to change his mind about the entire stated purpose of his party midway through his leadership
In what way?
As President, Lee supported the 'Taiwanization' movement which is basically the idea of emphasizing Taiwan as the centre rather than the old KMT view of China as the centre and Taiwan as an appendage, which led to suspicions during his presidency that he was secretly pro-independence, and indeed after leaving the presidency he was expelled from the KMT and he founded/inspired the foundation of the Taiwan Solidarity Union, which is basically the DPP on steroids supporting the declaration of a 'Republic of Taiwan' and a new constitution.
Then again, Lee appears to be a very odd person all around.