Inflatables mixed with life size?

I think it is fine! It is all in how you incorporate him into the overall scene. We have a huge headless horseman that the in laws gave hubs one year for his bday. It has never fit with our overall themes over the years...but we still put him out. And you know what? He is always well received and we get comments about him every year. I find we are often way more critical of our set ups than the general public. I say go for it!

My former neighbors had a lifesize Granny Apple witch by an inflatable arch. It worked great and looked great.

The only way to do Halloween wrong is to do something you don't like. If you like it, it's right! After all, it's your yard.

Not my cup of tea, but, to each his own...

As long as it is not one of those super cartoony ones that would create such a stark contrast, I do not see the harm - and lots of folks would probably be thrilled even then, with inflatables being so popular.