For what you're doing, in my opinion, you're no better off at Vanguard than at Schwab or TDAmeritrade. At Schwab, you can buy ETFs for no fee and the expenses are lower than anywhere else (including Vanguard). Your best bet is to search through the ETF list at Schwab and put them in order of ER. You can move from US equity (I use SCHB, which is near identical to Vanguard's VTI), US bond, International equity and then just buy what you're looking for.
I have accounts everywhere. For Vanguard, I have everything in one fund and I do nothing with it. With all the influx, it's often impossible to even talk with them and I don't want them screwing things up. My Vanguard ETFs are at TDAmeritrade since I trust their web interface and can get phone and online chat responses 24/7. I've got more at Schwab for taxable and use ETFs there for their lowest costs and high volume (low spread) in house ETFs.