Gold-standard drill make?
Generally speaking any manufacturer can make a high-quality drill if they want. Large manufacturers often do not because the number they would sell would be so small as to make no difference to their balance sheet.

Milwaukee makes good "contractor-quality" drills, like their "magnum" 1/2" drill, that you can find in trade shops.

There are two premium tool makers: Fein and Festool. Their tools cost 2 to 3 times what a Milwaukee costs. The differences, which are mostly convenience features, in my opinion do not justify the extra expense.

Note that you can "upgrade" a standard drill like a Milwaukee by taking it apart and replacing and aligning the bearings. A typical drill will have 3 rotary bearings. You can replace those bearing with much more expensive bearings and make sure that the alignment is perfect. You can always pay a machinist to do the same thing. Prepare to spend thousands.