Vanguard does have some good actively managed funds. I am mostly indexed in that my Govt retirement (TSP) system is mostly indexed. But my Roth is in Vanguard Asset Allocation (VAAPX) and I really like this fund, it suits my investment attitude in that whenever I start to figure its time to shift between stocks and bonds I notice they have already just moved in that direction. Now my orientation could be wrong but their investment approach is just what I would do.
There are a good number of indexed funds, managed funds, fund of funds and target funds just pick one or more and keep to a plan and it will probably work. A good fund with low costs and a long time is almost certain to work. Lots of people lose lots of money on high costs and getting in and out at the wrong times.