I don't know if you noticed this but many CPU coolers that are supposed to be the best and are recommended are freaking huge, like scythe mugen series, not only that but have even 2 fans.
Isn't that really disruptive to the airflow in the case and increases noise subtantially, they actually have the same amount and size of fans as the most cases themselves...
Just their size really repels me.
Had a Mugen 2 on a fairly cool CPU in my desktop. Huge tall rectangular tower of metal over the CPU. No fan on the CPU heatsink, depended on rear case fan and PSU fan (120 mm fan PSU) to draw air over it. Worked very well, airflow was beautifully straight lower front to upper back.
Generally the larger the heatsink the less you need to mess with the airflow to cool your CPU.