Simply put, no. He was indeed a very talented genius, but music has evolved way beyond what he composed. Since you asked about point of view, Bach wrote far more interesting music than Mozart. This is true for most Renaissance and Baroque composers. And the same is true for the composers of the Romantic, Modern, and Post-modern musical eras. Of course, this is just my opinion and not worth a lot

No. Mozart is a prominent figure in European art music history who composed and performed within an art era that was preceded and succeeded by different eras, and musicians who composed and perdormed under different circumstances. It is difficult to talk about all time best when dealing with subjects that manifested in different eras.

Also, Mozart performed Western art music. His mention in music discourse should be in the context of Western art music. Thus, the question could be modified to reflect the context of his musicianship; and the scope of discourse.