How can I remove specific top hits in Safari's address bar?

(Similar to this How can I remove an autocomplete suggestion from Safari's address bar?, but those answers do not help)

A site I visit frequently is located at:

http://example.com/sub

Unfortunately when I begin typing "exa" in the address bar, I get two propositions in top hits:

http://example.com
http://example.com/sub

with the first being highlighted, and used if I (miss the arrow down key and) hit enter

I have bookmarked and favorited the http://example.com/sub site and try to never visit http://example.com but never the less it always shows as top site.

I cleared my history of each and every entry to http://example.com/* except for http://example.com/sub, and redo that step every time I accidently visit the wrong site

And no, I don't want do delete my whole browsing history

It's actually not possible to remove the root domain from Safari's top hits. I've always had this problem and find it irritating.

As seen, I've never visited Apple's US website, but only the SG site. However, it still auto completes to it.

Unfortunately, the problem is that Safari autofills the root domain, before auto completing the sub domain.

So, even if you don't visit http://example.com, it would still show up since you visit /sub.

After brainstorming for days, I finally managed to find a solution. Putting it here since it may help others. Clearing history on one or all your devices doesn't help. All you need to do is show your Bookmarks from the bookmarks tab, search for the website you want removed from the top hits (it only shows in top hits because it's in your bookmarks) and delete it from there. That's it, the said top hit will stop appearing on all your iCloud devices.

What's rather disappointing in all this is even tech savvy people need to bang their head around to find a solution to such a simple problem. In Google Chrome, you can simply select that top result and delete it.