The best replacement for phish is grateful dead.

The best alternatives to phish are rated as following:
★★★★★  grateful dead
★★★★  widespread panic
★★  dmb
★★  dave matthews band
★★  umphrey's mcgee
★★  no phish
★  billy joel
★  dead
★  moe
★  disco biscuits
★  coheed
★  spam
★  string cheese
  dave matthews
  wilco
  further
  umphrey

Your alternative for phish is not listed? Suggest!
Speaking about phish, one probably shouldn't forget about giant country horns.

Other search terms related to phish and their ratings are:
★★★★★ giant country horns
★★★★ bela fleck
★★★★ kenny rogers
★★★★ john popper
★★★ alison krauss
★★★ phil lesh
★★★ bob weir
★★ neil young
★★ dave matthews
★ jimmy herring
You have in mind a companion for phish and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of phish in all years. Click on graph for more.
phish
grateful dead
widespread panic