In terms of coaches, you have Sheiko for Russian coaches who absolutely doesn't prescribe only using the big 3, and from there you can look at every athlete he has coached. You have Louie Simmons claim of using Russian methods, and how his folks don't even use the competition lifts in their programming in some instances. As far as deadlifters, you can look at George Leeman, who may very well be pyschotic, but got the American deadlift record while employing progressive ROM and lots of assistance work. Jerry Pritchett just got the deadlift record at the Arnold by doing more than just using the big 3.
While on the topic of record holders, the statically strongest human to ever live with verifiable lifts, Eddie Hall, didn't train in this manner. You can see how he trains in his documentary "Eddie" on Netflix, but it's "like a bodybuilder". Focus on muscles, train them hard with lots of movements. If we want to talk about the strongest human ever with questionably verifiable lifts (Paul Anderson), he ALSO chose to not train in this style. ROM progression, bodyweight work, assistance exercises, etc.
If I'm talking about dominance, Bill Kazmaier was so goddamn strong he was uninvited to World's Strongest Man to give the other competitors a chance to win. Watch his training on youtube; lots of assistance work. You can also find his training manuals online. Bill was also one of the greatest powerlifters to walk the planet while being one of the most dominant strongman on earth. Another super dominant strong person is Mariusz Pudzianowski, who still holds the record for WSM wins at 5, and ALSO didn't train in this style, but instead used a variety of assistance work. And in terms of guys approaching that, you have Brian Shaw holding 4 wins who also just won the Arnold today, and also uses a variety of assistance exercises. You can find out more about how he trains from his book.
This is just off the top of my head. I have only known a handful of PROGRAMS based around only doing the big 3, with Korte's 3x3 being one of them, and in most cases it was about specializing after a baseline had already been established.