Newegg has the LG 34CB88-P
34" 3440x1440 ultra-wide IPS monitor with FreeSync for $550
with code EMCBRCF35. That's more than $100 less than the best price offered for this monitor in the past year. The FreeSync range is listed as either 48 to 75 Hz or 55 to 75 Hz, which precludes LFC.
i7-8700K, H100i v2, RoG Strix Z370-G Gaming, 16 GiB, RX Vega64, Define Mini-C, SSR-850PX, C32HG70, RK-9000BR, MX518