Murky vs Uther
Murky can lane against Uther without any problems. Keep your distance from Uther because Murky tends to die when stunned. Uther has a difficult time killing your pufferfish. In the heat of the battle Uther getting blown up by the pufferfish if he does not have his timing perfect. Even if he does kill the puffer fish Murky can get a slime a few auto attacks on Uther.
Once Murky gets Fish Tank he can go ham on Uther. Uther will still probably win because of his stun. In a teamfight Uther will probably want to stun a more 'dangerous' hero. If he does use it on Murky then great. That means he can't use it on one of your team mates.