Unless I'm mistaken, the ANT751 is a Yagi design.
There's no guarantee it will work, but I'd try combining the Eagle Aspen and ANT751 at 90 degrees with a reversed splitter (or splitter/combiner) and see what happens. Worth a try.
If those coexist happily on the UHF band (with no obvious station losses or multipath or lowered signal quality) then feed them through a UVSJ or preamp to discard any VHF, and add the CS600 to cover your VHF stations.
Since the Eagle-Aspen works so well here, you could try combining two of those at 90 degrees through the reversed splitter, as mentioned. I don't know how the bowties work in tandem, but I'd guess they would be ok. You could put them in an arrangement like the DB8e (ie on the same vertical plane) - basically you are building a mini-DB8e. There must be an optimum separation distance when they are combined like that; the DB8e panels are separated by 27.125".
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