Warholm from everything below 1500m, Ingebrigtsen the rest
Both are generational phenomenons. Warholm can in theory much possible quit running 400m hurdles right now and concentrate all his efforts towards 400m flat and 800 without losing his first WR. Both are young with loads of years infront of them to perfect the other distances. Their sole motivation is to achieve greatness. Is it complete utopia 10 years from now or a tiny opportunity?