For reception of real channels 14 through 69, the Clear Stream 2 is a good choice for your location.
Your problem channels are all high VHF (7 through 13). You can add a H-VHF antenna and solve the problem.
You will need a
UVSJ. Antennas Direct offers a UVSJ with a weather-tight housing.
Antenna suggestions:
CS-5 or
Y5713. An alternative to a dual antenna system would be a small UHF/VHF combination antenna such as the RCA ANT-751 which would eliminate the need for the UVSJ.
You should not need any amplification, the signal power is more than adequate to drive up to an 8-way passive splitter. In fact, it would be likely that most amplifiers would overload, causing far more trouble. You have more than enough signal power, really.