Op-Amp for the 50MHz unity gain voltage
Use a Ground Plane. Bypass the OpAmp +VDD (and -VDD) to that plane within 1mm of the IC. Use Surface Mount Technology SMT Cs and Rs. Use no vias in the bypassing; each via is 1nanoHenry. Place your feedback resistors right at the Vin- (Virtual Gnd) pin of the Opamp, 1mm max distance. Assume 10pF capacitance on Vin-, and size the resistors to accomplish less than 10 degrees extra phaseshift; 1Kohm and 1pF is 1nS tau, 160MHz F3dB and 45 degree phaseshift at 160MHz, or 45/3 = 15 degrees at 480MHz; thus evaluate lack-of-oscillation with 430 or 240 Ohms Rfeedback..
Place a 100 ohm resistor, right at Vout pin, to isolate the OpAmp Feedback behavior from any downstream (next stage) capacitive loading; maybe you can reduce that 100 Ohm to 80 Ohm or 50 Ohm or 33 Ohm or 22 Ohm, or 15 Ohm, but be aware of how close you are to irksome overshoot and oscillation.

And do not use an opAmp ---- labled in the datasheet as stable from gains > 10, or gains > 2, or gains > 5, or gains > 100 ---- for unity gain performance.

Ohhhhh Do not use an older opamp, needing +- 8 volts VDD, in a 0/5v circuit