I do not believe there is any Elitism in Islam. I mean, the person in Africa, who struggles everyday and keeps his prayers and lives a rightoues life, will most likely be in a higher place in Jannah, than the person living in a comfortable life, but also keeping his prayers and living a rightious life. Maybe if the person living a comfortable life, who then memorized Quran and did alot more, would then be on a level head with the poor person in Africa.
In regards to the Prophets(pbut). If a Prophe was chosen and they were lazy and did nothing, then I don't think they'd be given a high rank in Jannah. Ofcourse, Allah(swt) wouldn't choose someone who was lazy, and we all know that all the Prophets chosen were the best of mankind. And all Prophets will go to the highest rank in Jannah.
However, we must not forget -
The Messenger of Allah (sallallahu alaihi wa-sallam) said: "The people most severely tested are the Prophets, then the righteous, then the next best and the next best. A man will be tested in accordance with the degree of his religious commitment; the stronger his religious commitment, the stronger his test." [Tuhfat al-Ahwadhi (7:78)]
Just imagine this;
Noah(pbuh) - Having to do Dawah for 900 years, and then saving his people from a flood.
Abraham(pbuh) - Having to sacrifice his son (as a test), subhanallah.
Moses(pbuh) - Having to go through alot of persecution
Muhammad(pbuh) - Having to go through so much, with such little hope of success. Many Academics re-iliterate, that from a Objective/Secularist point of view, the moment Muhammad(pbuh) started to give dawah, was the moment he set upon himself the greatest challenge anyone in the history of mankind has set. Despite all the difficulties and struggles, with the will of Allah, he was victorious. It resulted in him being the most influencial single figure in the whole of history, a man who's more closely imitated and followed than anyone else.
These people, despite being Prophets, are not going to get the highest rank in Jannah just because of their title, it's because of the test and how they overcame it, which proves their worth.
Though mind you, the Prophet Muhammad(pbuh) said that even he doesn't know whether Allah will give him access to Jannah or not. It is upon the will and mercy of Allah that anyone gets into Jannah.