I'm very surprised that Halas is the one I'm getting pushback on. I figured if anything it would be Lombardi, just based on his career length and thus win total.
Rest assured, I'm not including Halas because of how 'beloved' he may be, it was just based on his resume. The primary ones I've seen raised are Shula and Walsh, let's compare them directly and see how they stack up:
Wins
Shula- 347 Wins, 1st all time. 173 Losses, .665 Record (9th among Head Coaches w/ min 50 wins)
Halas- 324 Wins, 2nd all time. 151 losses, .671 record (8th among Head Coaches w/ min 50 wins)
Walsh- 102 wins, 46th all time. 63 losses, .617 record (18th among Head Coaches w/ min 50 wins)
Championships
Halas- 6 (Tied- most all time)
Walsh- 3 (Tied- 5th most all time)
Shula- 3 (Tied- 5th most all time). Note: One of his Championships was the NFL Championship in 68, which was subsequently renamed the NFC Championship, and he failed to win the Super Bowl that year. Since it was pre-merger, he's credited with an NFL Championship. Your call if it's deserved.
Longevity and Diversity of Talent
Halas- Coached for 47 years, won in the 2nd year in the league, won in 1963 (after Lombardi won his first 2). Won with 4 different QBs, running 4 very different offensive systems.
Shula- Coached for 32 years, won a championship (but lost the Super Bowl) in 1968, won his last Super Bowl 5 years later, in 1973. Won on 2 different teams, with 2 different QBs running 2 different systems.
Walsh- Coached for 10 years, won in 1981, last won in 1988. Won with two different QBs, running the same system.
Historical Impact
George Halas- Helped form the NFL. The only individual in NFL history to play on Offense and Defense as well as acting as a Head Coach, General Manager, and an Owner. Created new offensive formations and schemes. Acted as a player and head coach simultaneously. Won a championship, stepped away to serve as a Lieutenant in the Navy during World War II, and won a championship upon his return. Represented unparalleled dominance for 2 decades and maintained relevance of a franchise for 4.
Bill Walsh- Formed the last "new" offense in the NFL. Served as a head coach and a general manager. Made the 49ers the most dominant team of the 80s.
Don Shula- Had the only perfect season (0 losses in the regular and post season) in NFL history.
Challenges and Contemporaries
Halas- Faced different teams and schedules Every Year or close to it for nearly the first 20 years of his career. Faced Paul Brown, Vince Lombardi, Tom Landry, among others. Had to adapt to an ever evolving game and league. Career interrupted by World War II.
Shula- No meaningful unique challenges. Faced Bill Walsh, George Halas, Joe Gibbs, among others.
Walsh- No meaningful unique challenges. Faced Don Shula, Joe Gibbs, Chuck Noll, among others.
Am I missing something? With those resumes, is Halas really the weakest of the 3? Those who think Halas is not a top 5 coach, why not? What elevates the others above him? Is it really just that Shula won 23 more games (and lost 22 more games as well)?