Vorin is the last one. Gelebor didn't know. But Vorin woke after everything finished in the Vale, the Dragonborn helped the vampires.
He was melted from the ice somewhere in the Vale, and he was so confused and shocked when he looked around. Everything was gone. Ruins everywhere, but nobody lived.
He walked until he got to the Palace. Navigated the ruins, until he got to the balcony where Gelebor stood in the sun.
And talking to him, was the Dragonborn. Gelebor stopped, looking at Vorin.
"Child... you... you live..."
Vorin stumbled to Gelebor, who caught him in his arms. Vorin was terrified. Years ago, he watched his family get killed by Nords in front of his eyes, before he fell backwards off a cliff into a then-puddle, too deep to get out and too shallow to swim in.
He froze there when he stood back up. He knew who it was. Back hundreds of years ago, he heard of the Dragonborn. Then, it was different. Now, they're standing in front of his eyes.
"Dragonborn?"