可以有如下的几种途径：
1、把同位语从句后置,这是一种避免由于头重脚轻而造成句子臃肿的常用办法：
The idea is partially right to me that the greatness of an individual can only be evaluated by those who live after them rather than their contemporaries.
2、把同位语从句改为插入性或后置非限制性定语从句：
The idea, which is that the greatness of an individual can only be evaluated by those who live after them rather than their contemporaries, is partially right to me.
The idea is partially right to me, which is that the greatness of an individual can only be evaluated by those who live after them rather than their contemporaries.
3、用namely, that is (to say) 或i.e.等解释性词语引导原同位语从句,可以插入主谓之间,也可以后置：
The idea, namely the greatness of an individual can only be evaluated by those who live after them rather than their contemporaries, is partially right to me.
The ideais partially right to me, that is to say the greatness of an individual can only be evaluated by those who live after them rather than their contemporaries.
The idea, i.e. the greatness of an individual can only be evaluated by those who live after them rather than their contemporaries, is partially right to me.