Truth – The H1 title tag has little to no influence over your SEO.
What title tag you use to wrap your page or post headline, be it H1, H2, H3, H4 is strictly for styling purposes. Font styling and size is relevant only as a matter of preference and taste in presentation. There was a time when the title tag held some importance to SEO, now long gone as search engines are much smarter these days.
What is important is the content of your title. Make sure it affords a succinct description as to what the page is about and is relevant to the ensuing content. Never use more than one title or headline and keep it close to the top of the page.