Well maybe Turku also, as they have a pretty good and big arena there too, and the city is also quite enthusiastic about hockey. But I agree that Tampere is anyway the best option. Helsinki is fine too, although a shame that the biggest arena there isn’t available for using at the moment, because it was stupidly sold to Russian owners already years ago.
It’s stupid in general to sell locally important infrastructure to any foreign owned companies. Sure, I know that money talks, but still it’s stupid and short sighted.