Leopold Stokowski (1882-1977) was one of the most charismatic, if controversial, conductors of the 20th century.
In a career spanning 68 years, he demonstrated a keen interest in technology, appearing in several films (mostly famously "Fantasia"), and making a huge number of recordings, from 1917 until shortly before his death. He believed that records would bring music to the great bulk of people, many of whom might never attend concerts, being put of by the formality, and embraced each new technical improvement (electrical recording, the LP and stereo) with enthusiasm.
Stokowski would sometimes make changes to a composer's score, although we must remember that he grew up in the last part of the 19th century, when such adjustments were seen as entirely reasonable if they helped the music to gain acceptance.