Ataturk was one of many Ottoman Generals in Gallipoli. He was just the one with the most publicity. Faik Pasha, Wehib Pasha, Mehmed Essad Pasha, Fevzi Pasha, Cevat Pasha, Halil Sami Bey, and Yakub Shevki Pasha were all very talented commanders who also defeated all the other allied offensives into Gallipoli. Memed Essad in particular was ruthless in his defeat in detail of the ANZAC and Franco-British corps and Mehmed Essad's corps were responsible for around ~1/3 of the entire allied fighting casualties. Ataturk or no Ataturk, if the allies attack gallipoli with the same forces, same mentality, same goals and same logistics, then they were going to be repulsed.