Over the ear high decibel noise isolation

I am looking for some over-the-ear noise canceling headphones that can deal with really loud environments. I work in a lab/server room with high noise levels. I often listen to music or audio books as I work, and would need to wear them for several hours at a time.

As far as I can tell, most are built for more diverse sounding but relatively quiet environments like an office or public space, not for loud constant white-noise. For this situation, it may be better to call it noise isolation rather than noise canceling. Any other Tech/Developer/Engineers found a good pair for similar situations?

I wear earplugs when I’m not listening to music but regular in-ear or over-ear headphones don’t give me enough attenuation to protect my hearing. I have tried using the Walker Razor which are great for attenuation but get uncomfortable for long periods and have disappointing sound quality. I even got desperate enough to try fitting my headphones into some disposable earplugs… I would love to hear any suggestions!