Unless the artist is genuinely performing under different "personas" (sort of like how there are sometimes two-or-more distinct bands with the same members), you/iTunes will want all of the artist's albums grouped into a single album collection. And the artist's name happens to be sort key/grouping key for that album collection.

(The ARTISTSORT field exists, but old devices, e.g. original iPods, don't know about it, so digital distributors tend to eschew the use of it, instead using the regular artist field as the ARTISTSORT field.)