Career fairs and some colleges may have writing centers or people that assist with cover letters, resumes, etc.
If you dont have that opportunity, I would search some up. Find ones that resonate with you and copy it but make it your own. Thats what I have done and ive been fairly successful. You can tie personal stories in them and still make them sound professional.
I would think games like Divinity Sin 2, Balder's Gate 3 have solid stories given their nature.
Theres also simpler games like Cat Quest II, Diablo IV (I thought story was very meh), A Way Out, etc.
You just have to look? No genre preference listed