The best replacement for udyr is warwick.

The best alternatives to udyr are rated as following:
★★★★★  warwick
★★★★  jax
★★★★  olaf
★★★  vi
★★★  shyvana
★★★  nasus
★★  teemo
★★  amumu
★  trundle
★  xin zhao
★  rengar
★  rammus
★  ww
★  pantheon
★  twisted fate
★  shaco
  pulsefire ezreal
  malphite
  phoenix udyr
  shen
  volibear
  evelynn
  singed

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

Other search terms related to udyr and their ratings are:
★★★★★ smite
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udyr
warwick
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