If anyone deserves a statue, It's
Byron White. It seems like ancient history to a lot of people, but what he did in a lifetime is astounding. Colorado football is forever in his debt.
He was-
A native Coloradan.
2nd in the Heisman Ballot, going against East Coast bias far, far worse than today (There were no broadcast games, sportswriters were voting based on his newspaper write-ups alone).
Responsible for single-handedly taking CU to their first bowl game, the 1938 Cotton Bowl
CU's first All-American, and the first CU player to go to the NFL.
A player on Colorado's first post-season basketball team, 1938 NIT.
A Rhodes Scholar (as was his brother, Sam White, which helped legitimize CU as an academic institution)
Highest paid player in NFL history at that time, and one of the highest picks out of CU (Bo Matthews was picked 2nd, Michael Westbrook was also 4th overall). He led the NFL in rushing.
Served admirably in WWII, graduated at the top of class at Yale Law, and served on the Supreme Court for 31 years. Football aside, this alone makes him one the most notable graduates of CU anyway.
Byron White, in addition to maybe having the greatest overall resume of any American in general, laid the foundation for Colorado football with what he did for the Buffaloes. That includes both his playing days as well as his efforts as a major booster while practicing law in Denver. He also helped legitimize and popularize the NFL, which had been seen as a semi-pro league far inferior to Major League Baseball (adding a scholar-athlete like White brought the pro game into the national conscience). His playing career put CU, and Rocky Mountain college football generally, on the map, and likely paved the way for CU to join the Big 7 shortly after the war.
Any lists of GOATs or potential statues without him is in error. Plus he did that really cool flying pose, which is perfect for a statue.
I think Bobby Anderson would maybe be a good choice (it diversifies the timeline, it would be weird to have a bunch of statutes from the 80's/90's only)