The viacom horse may have been from a Dora the explorer play set! Dora the Explorer LOVES PONIES ADVENTURE playsetI never would have guessed!But, yes! The eyes are VERY Dora-styled! Haven't found this one precisely on google, but, the same mold being used for various other Dora horse sets. Thank you!
The last one looks like a mini fantasy filly :)
that last one is definitely a "fantasy filly" - not really a fakie, it is a very cute line of fantasy model horses from the 1990s.