The best replacement for puller is pusher fan.

The best alternatives to puller are rated as following:
★★★★★  pusher fan
★★★  reacher
★★★  audie murphy
★★  pusher fans
★★  diesel pusher
★★  jack reacher
★★  george patton
★  pusher
★  pusher electric fan
★  trencher
★  glue puller
  pusher electric fans
  tree shear
  ez puller

Your alternative for puller is not listed? Suggest!
Speaking about puller, one probably shouldn't forget about slide hammer.

Other search terms related to puller and their ratings are:
★★★★★ slide hammer
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puller
pusher fan
reacher