Besides a 14th level Monk, what is the most amount of saving throws a character can be proficient in permanently?
As best I can tell, it's only possible to gain proficiency in 4 saves by playing a Rogue to 15th level and picking up the Resilient feat along the way. Doing this gives the character proficiency in Dex, Int, Wis, and whichever save Resilient is applied to.
Is this the best that can be achieved? Is it possible to be proficient in 5 or even all 6 saves without being a monk? I'm interested in anything that can be achieved using the the standard rules or UA material.