Most aliens are humanoid if not human-like, especially in TV series because actors are human. The Greys described in UFO folklore match this body type. Humanoids include:
in Star Trek: The Next Generation, the episode "The Chase" revealed that all the humanoid races in the galaxy are the result of genetic tinkering by a single humanoid race in the distant past called The Preservers.
similarly, in Marvel Comics' The Eternals, it was revealed that many species were genetically tampered with by the alien Celestials.
Feline humanoids
This form has been popular. They are usually warrior-like as well:
