Based on your TVFool report, you have strong signals. A small attic mounted ANT751
, aimed with a compass roughly 320° N/NW
should get you all the channels in the upper part of the list, shown in green.
You do not need to ground an attic antenna, and with the strong signal strengths, should be able to split it to the two TVs in the way that you mentioned, without any sort of amplification, as long as the coax runs are not excessively long. If re-running the cable directly would reduce cable length significantly, I would consider dropping cables directly from the attic in to the rooms (down through closets is the easiest way) and omitting any attic-to-outdoor-to-indoor run. But try your method first though, as it might work fine. If signal strengths are low, re-run the shorter way.
If there are any unused splitters anywhere in the cable runs, remove those and replace them with a barrel splice
. And only use a splitter with no more taps than what you need. IOW, if you only need 2 splits, don't use a 3-way; use a 2-way.