For English-only an non-commercial, Parakeet has been almost flawless for me.

https://huggingface.co/nvidia/parakeet-tdt-0.6b-v2

I use it for real-time chat and generating subtitles. It can do a tv show in less than a minute on a 3090.

Whisper always hallucinated too much for me. It's more useful as a classifier.