Noctua NH-D14, Premium CPU Cooler with Dual NF-P14 PWM and NF-P12 PWM Fans (Brown) CPU Fans & Heatsinks - Newegg.com
Oddly-Specific PSA: G.Skill's Trident Z memory fits under a Noctua NH-D14 just fine, even though it is not listed for compatibility due to it's 44mm height : r/pcmasterrace
Noctua DH-15 cooler and RAM compatibility - YouTube