You may want to try keeping them separate
I think the "right" way to approach this is for your personal books and your business's books to be completely separate. You would need to really think of them as separate things, such that rather than being disappointed that there's no "cross transactions" between files, you think of it as "In my personal account I invested in a new business like any other investment" with a transfer from your personal account to a Stock or other investment account in your company, and "This business received some additional capital" which one handles with a transfer (probably from Equity) to its checking account or the like.
Yes, you don't get the built-in checks that you entered the same dollar amount in each, but (1) you need to reconcile your books against reality anyway occasionally, so errors should get caught, and (2) the transactions really are separate things from each entity's perspective.
But if you really want to put everything in one set of books
The main way to "hack it" would be to have separate top-level placeholder accounts for the business's Equity, Income, Expenses, and Assets/Liabilities. That is, your top-level accounts would be "Personal Equity", "Business Equity", "Personal Income", "Business Income", and so on. You can combine Assets and Liabilities within a single top-level account if you want, which may help you with that "outlook of my business value" you're looking for. (In fact, in my personal books, I have in the "Current Assets" account both normal things like my Checking account, but also my credit cards, because once I spend the money on my credit card I want to think of the money as being gone, since it is. Obviously this isn't "standard accounting" in any way, but it works well for what I use it for.)
You could also just have within each "normal" top-level placeholder account, a placeholder account for both "Personal" and "My Business", to at least have a consistent structure. Depending on how your business is getting taxed in your jurisdiction, this may even be closer to how your taxing authorities treat things (if, for instance, the business income all goes on your personal tax return, but on a separate form).
Regardless of how you set up the accounts, you can then create reports and filter them to include just that set of business accounts. I can see how just looking at the account list and transaction registers can be useful for many things, but the reporting does let you look at everything you need and handles much better when you want to look through a filter to just part of your financial picture. Once you set up the reporting (and you can report on lists of account balances, as well as transaction lists, and lots of other things), you can save them as Custom Reports, and then open them up whenever you want. You can even just leave a report tab (or several) open, and switch to it (refreshing it if needed) just like you might switch to the main Account List tab. I suspect once you got it set up and tried it for a while you'd find it quite satisfactory.
