The best replacement for snoopy is red baron.

The best alternatives to snoopy are rated as following:
★★★★★  red baron
★★★  red baron song
★★  garfield
★  lucy
★  red barron
  bloody red baron
  linus
  sloopy
  droopy
  woodstock
  charlie brown
  peanuts

Your alternative for snoopy is not listed? Suggest!
Speaking about snoopy, one probably shouldn't forget about woodstock.

Other search terms related to snoopy and their ratings are:
★★★★★ woodstock
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snoopy
red baron
red baron song