Would like to get a tattoo with my daughter's name, Denali, in Sanskrit, and am looking for a legit translation.

I guess the denali means the great one. The translation will be महान or अद्वितीयI or सर्वोच for a girl's name अद्वितीयI will be very good. सर्वोच will also be nice. Denali = देनालि this is exactly how denali will be written phonetically.

For what it's worth - "Denali" actually means "The High One" in Athabaskan languages of Alaskan natives.