不，就用are

is/are 跟着主语走是英语的普遍、常规用法。所谓“就近原则”只是遇到非常规语法现象时 总结出来的 口诀而已

there be 句型遵循着两个相互矛盾的原则：既可遵循就近原则，又可遵循语法一致原则，前者大多用于口语体，后者多用于书面语体，在英语教学上最好是承认上述两种用法都是正确的。连很多英语老师也都没有搞明白这个问题。

就近原则好像只是我们的说法。他们叫省略。非正式中is和are也是乱用。正式中不建议there be用单数+复数名词，最好改写成其他句型。
你想作为整体就是here are (his leg and his foot) (这是他的腿和脚)
你想分别说明强调
就是here is his leg and (here is) his foot.(这是他的腿，(这是)他的脚。省略了第二个here is。
个人理解。

看大脑容量

如果是here is his leg，那么就是is，如果是原句子，那么就是here are his leg and his foot.
his leg and his foot 是一个复合事物，也就是复数，所以这里必须使用are，和就近原则没任何关系！

这是一个倒装句，主语是his leg and his foot，主谓一致，谓语需使用复数。正常语序：His leg and his foot are here. His leg is here. His foot is here.

可以用is是就近原则