Which PC Build should I go for? I have a 1440p 280HZ OLED monitor

I recently built a new PC and have a 1440p 280Hz OLED monitor, so I need a system that can push high frame rates at this resolution to fully utilize the display's speed and image quality. Should I prioritize a powerful graphics card like an RTX 4080 or RX 7900 XTX, and which CPU would best avoid bottlenecking at 1440p for competitive shooters and fast-paced games?