simulation loop stability
1.) At first, the closed loop gain exhibits some "peaking" (it´s not a "ripple") indicating a stability margin which perhaps does not meet your requirements - however, the circuit "seems to be" stable !
2.) However, from this simulation alone you cannot be sure that it is stable, because at least the phase response has to be shown (therefore: "seems to be"). The problem with any simulator is, that the magnitude response as a result of an ac analysis can be fine - in spite of instability.
3.) Perform a TRAN analysis - that´s the best way to see if it works satisfying or not.
4.) If not, do a stability analysis of the open-loop function.