Can't find the guy in the bank that sells more space for invy

uomeurlife_ESO

I've looked everywhere

Enodoc

They're not always located in the bank, but there's also a bug where NPCs are invisible that should be fixed in the next patch.

Here is a list of Pack Merchants and where they are:
http://www.uesp.net/wiki/Online:Pack_Merchants

JediRift

Had same issue the other day becauseI google searched and people said to check Daggerfall bank. However, the vendor that sells bag space is ACTUALLY just outside of the bank in the courtyard area. Look for a small cart with the bag space sign. It has a bunch of backpacks on the ground around it.

MissBizz

The guy in davon's watch is TERRIBLE to find. Bah. Hopefully you found him now