Proof Yoda>Hero of Tython
Well, I'm pretty sure everyone thinks this already (besides a select few...but not going to name anyone *cough* S_W_LeGenD *cough* but whatever).
Anyway, just got the 2013 book Star Wars: The Legendary Yoda and it states:
"The greatest Jedi: Yoda, defender of the galaxy, master of the Force, and the greatest Jedi who have ever lived."
"Yoda's ability to use the Force is greater than that of any other Jedi."
"...the most wise and mysterious Jedi Master of them all."
"During the Clone Wars, Yoda's reputation as a great Jedi warrior grows. At the Battle of Rugosa, he defeats a battalion of battle droids with only a few clones to help him!"
(Note: A battalion consist of 300 to 1,200 soldiers!)
And then in Star Wars The Sith Wars it states: "Yoda was the oldest and most powerful Jedi in the order."
Later in Star Wars: Blast Off! it states "Meet Yoda. He is the most powerful Jedi."
Also in Star Wars: Mysterious of the Jedi it states "Yoda is an immensely powerful Jedi..."
Finally, a scan of numerous more accolades on a mere page (no, that's not my finger):
Add these accolades came out after SWTOR, and then in all the previous quotes saying Yoda is the best (there are countless), and it's literally canonical that Yoda>Hero of Tython or any other Jedi before him. Thanks for reading.