I had something like this happen on my PC-NA account. Of the 12 characters, 2 of them would always crash when trying to log on to one of them after returning to the Character Select Screen from a different character. The only way I could safely logon to them was if they werre the first character entered from the Client Launcher.

I have identified the issue, however, and worked through a solution. The thing that the characters had in common were rubbings from the Ancestral Tombs in Vvardenfell. Three days ago I tried clearing those rubbings at the library, on one character, with no change. Two days ago I hunted them all down, on one character, to get the "Ancestral Tomb Hunter" Achievement, with no change. Yesterday I completed the "Lost Library of Andule" Quest on one character and then found, today, that I no longer had an issue with that character. Today, I did the full tomb sweep and Andule Library Quest on the other character.

So if you are having this issue and have a couple of rubbings I suggest finishing the Tomb Hunt and Andule Library Quest

It's likely another issue then. Hmmmm Votans Mini-map is still causing problems for me, do you use add-ons?