Don't waste money buying avocados from Lotus, Tops, Big C, Makro, or Yok. They mark up the prices too high. Buy from the talads. There are multitude of varieties in almost all talads. Here are the best varieties I have found, sold in Chiang Mai talads, and some are better than Haas.
Table 1. Fruit Characteristics of Some Avocado Cultivars in Thailand
Buccaneer pear shaped
Booth7 round Booth8 pear shape Russell #034 long oval
Fuerta pear Haas oval Peterson round Ruehle pear shape.
Personally my favorites are Buccanner and Russell034.