Motion and temperature sensor next to bell switch: Ospel, Simon, Schneider, Legrand?

I plan to control the lights in the house with bell switches, which will be connected to a shelly 2.5 and a shelly dimmer. In a couple of places I want to add room temperature sensors at the switches (I'll plug in a DS18b20), and a motion sensor. To make this elegant, it should preferably be in the same decor as the switches. I will connect the sensor to some additional input from Shelly or another ESP and maybe I will control it myself, maybe I will also use it for monitoring, I don't know yet. I am programming ESP and in can build/design some electronics. Question: do you use, what would you recommend, of the off-the-shelf motion sensors for the box next to the bell switch, something from Ospel, Simon, Schneider, Legrand...? Or does any manufacturer have some dummy sensors where you can nicely make a hole for another PIR sensor and mount a ds18b20?

A few things to bear in mind:
1. Shelly do not have an isolated inverter - you need to be careful when connecting other circuits.
2. the ESP+power supply heats up a bit. Normally this doesn't cause a problem, but if there is a ds18b20 nearby then the problem is already there - results will be falsified.
3) I had a Shelly 1 - sometimes had reception problems. The problem may have been my switch, whose design is based on a steel plate (it's all about the screw-on component), and such steel is quite a screen. Nowadays you can buy touch switches based on the ESP8266.