Adam- the first human.
Anytime I eat fruit, like an apple or orange, I sometimes think back on how God created it.  These fruits are a perfect example of God's love for us.  The seeds of the apple are tucked deep by the core so we can enjoy a crisp, juicy bite of apple.  And it's amazing something so crisp can be so juicy at the same time. Then there's the orange.  God has created a pre-sliced fruit that we only need to peel to enjoy it's utter splendor and deliciousness.  Sometimes when I eat a particularly sweet, juicy orange- I say, "God, you really knocked it out of the park with this one.  My, my, my."  But how would God know how good these fruits- and his entire creation- would be to us lowly, mortal humans?  This is where Adam plays a role.  I think Adam was God's beta-tester.  God makes a banana- gives it to Adam and says "what do you think about this?" Adam: "It's grand."
God: "here's a potato"
Adam:  "I like apples better, but that will do if there's nothing else around"
God:  "what do you think of this melon?"
Adam:  "It's huge- I can't eat the whole thing.  I will call it watermelon and feed it to my children"

Of course, God had to make Eve first, and that's a story for another day.