Israel would probably be fine with Egypt but there's not much love left between Egyptians and Palestinians, and Egypt has its own shit to deal with in more than one way. The US is problematic for the same kind of reason: Palestinian distrust.
What could actually work is Germany, or more generally speaking a EU contingent under German command: Europe provides just over 50% of the total aid to Palestine and Palestinians know that, 20% from Arab countries, 11% from the US. (Providing aid to Palestinians is our favourite way to tell Israel's right wing to fucking cut it out).
All that hinges on Netanyahu and his Kahanites getting ousted, though, there can't be anything benefitting a peace process while von Papen and his fascists are in power as their power depends on conflict. Poll-wise it's looking good.