Exeggcute is lower on this list than some may have expected because it's a bit misunderstood. The reason for that is that there isn't a definitive consensus on what Exeggcute is supposed to be.
This ambiguity surrounding Exeggcute's identity dates all the way back to Pokémon Red and Blue, in which the Pokédex says that it is "often mistaken for eggs". Yet, in Ruby and Sapphire, it says that Exeggcute "consists of six eggs that form a closely knit cluster". While many of its Dex entries reference it having a shell (like egg), Pokémon FireRed was the first game to suggest that Exeggcute is actually "more like plant seeds"... with eyes.
It could also be based on coconuts (with eyes), as they are regularly hunted by Crabrawler in Alola and coconut crabs are a thing. It could also be a reference to eggplants (with eyes), even though they don't look anything like eggplants.
But regardless of what they actually are, Exeggcute is just a pile of six eggs/seeds/coconuts/eggplants with eyes, and that's a pretty unimaginative design.