First of all, to avoid any silly confusion, they can obviously not change coach right now. But, they could have replaced Hardy back in may, or during the summer - someone else (Anders Hedberg or Wallin) could have selected the roster.
There are at least two coaches that in my opinion are far superior than Hardy, viz. Conny Evensson and Pär Bäckman. Though Evensson is retired, he would probably have accepted to coach the team during the World Cup, and then returned to retirement. Evensson is probably the best Swedish coach ever and would obviously do a better job than Hardy. As for Bäckman, they would never appoint him since he is far too outspoken, but he is one very good coach - anyone remember when he turned Färjestad from relegation candidates into champions in 15 months?
As for the rest, other more or less plausible candidates - Bendelin, Wikegård, Kent Forsberg, Curt Lundmark, Kulon Lennartsson - have one advantage over Hardy: They have never lost to Belarus.