Triplets implies that all 3 are on roughly equal platforms and at the best or near the best at their position in the NFL at QB, HB, WR.
Aaron Rodgers
Aaron Jones
Davante Adams
One of those 3 is not like the other. The Packers did just fine with AJ Dillon earlier this year... Jamaal Williams last year... Fat Lacy/Skinny Starks in the past. Jones is replaceable.
Aikman/Smith/Irvin were in that category in the 90s, with Aikman probably being slightly the weakest of the three.
Romo/Murray/Bryant were definitely in that category for two years in 2013, 2014.
Dak/Zeke/Dez were arguably in that category for one year in 2016, but it was clear Dez was declining.
Rodgers and Adams are in that tier, but Jones isn't. Jones is just another running back.