What if Glorfindel joined the fellowship to Lothlorien?

[Inziladun]

Originally Posted by Arathorn111

The main reason for adding Glorfindel as a guard, according to my weird little world, was as a precaution towards Durins Bane, should the fellowship be forced to take the route through Moria.

That returns to the fact that the true nature of Durin's Bane wasn't known by any of the Fellowship, or indeed by anyone in Rivendell. Both Aragorn and Gandalf had been through Moria previously, and neither had perceived, or apparently encountered, the Balrog.
Dáin had gotten a partial glimpse of it during the Battle of Azanulbizar, but had no inkling of what it was.
That being the case, Gandalf's logic for not including an "elf-lord" in the Fellowship is sound enough.