How well do you know how your 1000 reporting works? Does it always report the taxpayer as whatever is on line 1 of the account setup? The answer to that question will inform the answer to your question.
If you have to have line 1 match the TIN used on the account, I'd title it this way:
[SOLE MEMBER'S NAME] MBR
[LLC NAME]
[AGENT NAME], ESCROW AGENT
ADDRESS
If you don't have good controls on teller decisions (teller terminal alerts to let them know not to deal with anyone other than the named escrow agent), that styling can be a problem.
If your system allows you to pick the line that is reported in any 1099 filing (or lets you otherwise designate what info goes to the IRS), here's another option:
[AGENT NAME], ESCROW FOR
[LLC NAME]
[SOLE MEMBER NAME] MBR
ADDRESS
_________________________
John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8