I also bought this one because I wanted a passive solution. Temperature looks fine (45°C in Idle). Although I think there are different versions and some of them don't fit perfectly on the RPi4. I got mine from amazon and it cools the three most important chips but the position where it touches the chips isn't perfect.

Same. Passive cooling works great and the heatsink is also a case. Dead quiet and no throttling.

I'm using as a media center with my cheap 75 inch TV.