I don't think you will be able to avoid both fees and taxes. Even if you transfer in-kind to Vanguard, you are still paying the internal fund expense ratio, whether it is a mutual or ETF. I took a quick look and it looks like TRP ETF have "high" expense ratios.
Turn off reinvestment, funnel those to Vanguard. Sell anything with losses, funnel that to Vanguard. Or, sell as much as possible to net zero gains, and see where things stand.
I have one remaining fund holding at TRP. It is now pure house money (thanks to large taxable distributions) and it would take a 1929 level crash to get out without taxes, so I just let it ride.