You were smart to check.
As far as I know, Noctua is the only cooler vendor that does that check.
The position of the first pcie x16 slot relative to the cpu socket is not exactly standard.
What is the make/model of your case and ram?
Your strongest cooler would be the NH-D15s which is a high compatibility version of the top cooler, the NH-D15.
It is quiet and efficient.
Tailored to provide superior RAM and PCIe compatibility, the NH-D15S is an asymmetrical single fan version of Noctua’s award-winning flagship model, the NH-D15. Thanks to its asymmetrical design, the NH-D15S clears the top PCIe slot on most µATX and ATX motherboards. At the same time, the single...
noctua.at
As an alternative, the NH-U12A would certainly fit.
The NH-U12A is the latest, 5th generation of Noctua’s award-winning NH-U12 series of 120mm size premium-quality quiet CPU coolers. Conceived to push the envelope of the 120mm form factor, it combines two of Noctua’s flagship model NF-A12x25 PWM 120mm fans with a completely redesigned heatsink...
noctua.at