As time went on, cries changed to reflect the sound capabilities of the games. Early mon had a simpler more narrow range. But some stood out. Here’s a comparison of R/B to Sw/Sh Gen 1 pkmn:
edit: I really like how in Gen 8, Haunter and Gengar sound like they’re talking or screaming. Like a ghost in your ear.
And here’s the Gen 1 from PkMn Stadium:
Raichu always was a favorite. But Starmie has also been a long time fave. Rayquaza might be a favorite now, because it sounds like an ancient creature.