The correct answer is “for”
be great to 后面一般都是接人或物,有的时候也可以接动作,for example,1）This would be great to u .2）It's really great to be here.3）It‘s great to see so many ppl here talking about this issue.
be great for后面一般也是接物或动作,但如果后面接的是动作的话,一定要用动名词形式,也就是ing形式.for example,1）this would be great for me 2）this software is great for exploring photos by photographers,time ,text and group 3）Having a funy name is great for online marketing.
be great with 一般with带有因为的意思.所以这里不能选.
希望上述说明对你有所帮助!