Wifi and bluetooth PHY on SoC
The "dumb" wifi/BLE chip will only support the interface protocol it supports. That might be SPI/I2C/Parallel/etc. Unless it also has an Ethernet PHY/networking stack on it, having an Ethernet PHY on your main processor won't help you talk to it any faster. If you want an SoC with Wifi, BLE, and Ethernet, you will just need to find one, if such an SOC exists.

One note though, if you are questioning how to connect various SoCs together for networking, perhaps a custom designed PCB implementing a cortex A53 is not the best project for you. The A-series microprocessors have a lot of requirements in terms of supporting chips, such as flash, ram, and power supplies. Furthermore, a physical Ethernet implementation is not trivial.