These are also good examples, in my opinion. We all have a different point of view on what is refined as there's a range of type pictured in this thread, but here's some more input from me from my point of view.
Here is the stallion I co-own with Erica,
Erica's Echos of My Destiny. He's currently a 3yo stallion w/ his Halter Hall of Fame, Multi National Top Ten, Five and Three, Many time champion and grand champion in both registries. He's pictured here as a yearling, and is a grandson of both Alvadars Double Destiny and Little Kings Bucke Echo. As a 3yo, he's about 32.5"
above as a yearling
above currently as a 3yo
Then this is my stallion,
Erica's Gone and DunIT. DunIT is currently a 2yo but he hasn't grown an inch since a yearling. Stands 31" tall and is also National Top 10 out of a huge open halter class, and AMHA Honor Roll (halter). He's a multi champion. Grandson of both Ima Boones Little Buckeroo Too (BTU) and Yellow Diamond Little Feather, and a great grandson of Egyptian King...
above as a yearling
pictured above currently as a 2yo
Then, here's nothing fancy in terms of pictures, but this is a yearling filly I own pictured prior to shedding off completely --
Fantasy Corrals Secret Treasure. Her breeding is loosely similar to DunIT's with Buckeroo on the top, and Egyptian King on the bottom.
above currently as a yearling.
And, here I think is the last one I have yearling pictures of that fits the catagory. This is my favorite horse, my B division show gelding,
Little Kings BT Bacardi Gold, pictured as a yearling at Erica's, and then as a 3yo in my front yard. He is a SON of Ima Boones Little Buckeroo Too (BTU) and has the most heart of any horse I own.
pictured above as a yearling at Erica's
pictured above currently as a 3yo