What are some spell interweaving champions?

So, I really like champions who are able to overlap spells and whose kits are really smoothly put together (like , not like ). What are some other champions who are able to buffer/cast in between other spell casts, like how Gragas can Q+E+R+W all in about 1.5 seconds with overlapping spells?

######I'm excluding Rengar from possibilities, I know he fits the bill but I don't like him xD