The first person to mention is of course, founder, Jigoro Kano. There are other names such as Yasuhiro Yamashita, Tadahiro Nomura, Ryoko Tani, Jane Bridge, Anton Geesink, Neil Adams, Ingrid Berghmans, Kovacs Antal, Ilias Iliadis etc… The most recent is certainly Teddy Riner.
Read all about their success and history via the following link: https://www.ijf.org/history/hall-of-fame/94