You DO know of course that VHF
rarely needs any sort of preamp? That's why I think the Televes preamp would work best for you, as it's agc controlled, and will throttle down if needed.
Have you checked around your house to make SURE you don't have electronic devices that are jamming your channel? Or, a local FM radio station blasting you? I had two: a Harbor Freight battery tender running in the garage, jamming RF12. I used an AM radio, and could pick up the radiated RF from that battery tender 300 feet AWAY from my property! I threw it away.
Then, a Dell laptop power brick started causing nearly the same issue. I replaced that with a new one, and problem solved again. Even some LED lightbulbs can cause issues on VHF, or a noisy power transformer on a pole, down the block from you...
This is a great filter, but I see they are temp out of stock:
FM Filter
I have an old MCM Electronics FM filter in my system, ahead of the preamp (that already has an FM filter) because I have an FM tower that's twice the power of my most powerful local tv station...