The genuine world class strikers don't play in the PrL anymore. The PrL is overrated as can readily be seen in the ChL performances of English clubs. Leicester's advancement to the round of 8 as the best result was the biggest fluke in football history, given how completely outclassed they were against Seville. Genuine world class strikers are the likes of Ronaldo, Messi, Suarez, Neymar, Aubameyang, Lewandowski, Higuain, Cavani ...Even if some of them formally speaking are wingers or attacking midfielders they may just as well be called strikers because of the flexible systems they play in.
Aubameyang would be a sensational signing, but there is alas no chance of getting him.