Draw a dividing line between funds charging 0.50% or more, and those that charge less. That will eliminate the two non-Vanguard funds from your list (and sadly, those are the improved expenses according to OP's first post). Given that leaves you a US index, international index, and bond index... it's time you learn about the 3 fund portfolio.
The idea is to make two decisions: your bond allocation based on time until retirement. Maybe (age - 20) in bonds, or about 30%. That leaves 70% in stocks. A Vanguard paper on diversification said the most likely benefits to having international funds occurs at 20%, but can provide a benefit up to 40%. Since this is new, find a percentage you can stick with when things go wrong: 20% x 70% = 14% international, or 1/5th of your stock allocation.
So here's my rough guess at an allocation (age ~50, new to international investing):
30% Vanguard bond fund
14% Vanguard international stock fund
56% Vanguard US stock index
As you might expect, I'm not a financial adviser. I'd recommend you take on that role, and learn about 3 fund portfolios. They seem to nicely fit what you have available to you at low cost in your retirement plan.
https://www.bogleheads.org/wiki/Three-fund_portfolio
