Why bitrex is not in your list. Bitfinex is mostly you can in the forum itself.
Bitrex and polenix are best exchange sites in the market which can be used widely and even many coins listed in coinmaketcap also will direct to reach the bitrex site only.
Since these kind usage range, I would like to go for bitrex only as the bestie one in the trusted exchanges.
For fiat exchanges I use to go with the localbitcoins.com always.