20. Tim Elliott
The Ultimate Fighter 24: Tournament Of Champions featured flyweight champions of all different organizations from around the world, coached by Joseph Benavidez and Henry Cejudo, where the winner would get a title shot against champion Demetrious Johnson.
Tim Elliott, who went 2-4 with the UFC from 2012 to 2015, returned on TUF and beat Charlie Alaniz, Matt Schnell, Eric Shelton, and Hiromasa Ougikubo for Team Benavidez. Elliott would lose to Johnson in a hard-fought decision and still is under contract with the UFC today. Elliot is 5-6 during his second stint with the UFC, most recently beating Tagir Ulanbekov at UFC 272. Elliott is scheduled to face Allan Nascimento in June.
19. Ryan Hall
Ryan Hall competed in and won Ultimate Fighter 22: Team McGregor vs. Team Faber, fighting for Team Faber. Hall is a well-known grappler who beat Johnny Nunez and Frantz Siloa but lost to Saul Rogers for the final spot. A visa issue prevented Rogers from fighting in the finale so Hall replaced him and beat McGregor's teammate Artem Lobov to become the lightweight winner.
Hall is 4-1 since then, most recently defeating Darrick Minner at UFC 269. Hall has been battling various injuries since his last fight and is looking to return in the fall, though it has been hard to find fights in the past due to his fighting style.