Can I blend Future Perfect and future-in-the-past? For example,
He would have served the remainder of his term and leave office in 1990.
It may be confusing since the "would have" structure is also used in the 3rd type of conditionals so the sentence could be misinterpreted (not that he did serve it completely, but that he could serve it if some conditions were met but didn't, at least if the sentence didn't have the second half). The reason I don't want to simply use future-in-the-past is I want to stress that the action was completed.