The best replacement for single pole is double pole.

The best alternatives to single pole are rated as following:
★★★★★  double pole
★★★★  double pole thermostat
★★★  double pole switch
★★★  double pole breaker
★★★  3 way
★★  3 way dimmer
★  3 way switch
★  double pole circuit breaker
★  three way
★  two pole
  2 pole
  double pole socket
  2 pole switch
  double pole switches
  double pole circuit breakers
  three way dimmer
  3 pole switch
  three way switch
  dual pole
  double pole thermostats
  three way switches

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Speaking about single pole, one probably shouldn't forget about 3 way switch.

Other search terms related to single pole and their ratings are:
★★★★★ 3 way switch
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single pole
double pole
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