I think I found someone that might be Hoid in WoA!!
Here's the quote:
A voice, however, stopped her. The speaker was a middle-aged man with an ash-stained beard and a dirty cap held nervously in his hands. He was a storng man, probably a mill worker. His quiet voice seemed a contrast to hist powerful build. "Lady Heir. What will become of us?"
The terror--the uncertainty--in the large man's voice was so piteous that Vin hestitated. He regarded her with hopeful eyes, as did most of the others.
pg 229 WoA
The bearded at the front continued to twist his cap, however, looking at Vin. "They're right frightened Lady Heir. Right frightened."
pg 230 WoA
Right after this, Vin said that she would help the people, and protect as best she could. It is the first time she says anything like it to the people (if I remember right)
Since I was looking through books, I decided to put these in too:
Here is FE Hoid:
The scrawny bald man bowed deeply in the misty night.
pg 268 FE
Here is Elantris Hoid:
Sarene had never seen his face, but she assumed from his voice that he was an old man.
pg. 562
Here is the descirption of Hoid from Warbreaker:
[quoteHe waved his hand, and an elderly man with an extraordinarily long white beard approached.
pg 430 Warbreaker 6.1
As she looked more closely, she could tell that he wasn’t quite as old as he seemed at first glance. The beard must be a badge of his profession, and while it didn’t appear to be fake, she suspected that it had been bleached. He was much really younger than he wanted to appear.
pg 431 Warbreaker 6.1