Complex sentence: Several of Tanner's paintings were purchased by Atlanta art collector J. J. Haverty, who founded Haverty Furniture Co. and was instrumental in establishing the High Museum of Art. Tanner's'is among several paintings from the Haverty collection now in the High Museum's permanent collection.
Split into simpler sentences: Several of Tanner's paintings were purchased by Atlanta art collector J. J. Haverty. He had founded Haverty Furniture Co. and was instrumental in establishing the High Museum of Art. Tanner's'is among several paintings from the Haverty collection now in the High Museum's permanent collection.