A Voltage follower based on an LM662 would be perfect end easy to do. The second amp could provide modest gain and be capable of a 0 - 5V swing... From a 5V supply because of rail to tail output and the inputs work well from ground to Vcc or nearly so. There are many similar parts most newer ones will be probably better and many for different causes, I just like the 10 mA output current... Got bored one day and made a relay operated timer where the relay was the switched source current for turning off the op-amp... Put an LED on it and let people try to ... go figure..
Bob