Ranking Issue
I have been optimized my website & added niche content on it. 
But still my website is not ranking in top position (not even top 10). 

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Tried all SEO checker tools, SEO tools showing 90+ rating. 

Could you guys suggest idea to improve the ranking.
@Garyson, although you have been a member here since 2014, you've only made two posts - one that was flagged right away as "fluff", and this one above, in which you are asking for SEO help.

I'm going to remove the domain name in the post, and hopefully, you can provide more background or statistical data. Then, maybe someone might offer some suggestions. 

No one is going to do an SEO audit of a domain for free, so hoping for that result is pointless.
@Garyson, although you have been a member here since 2014, you've only made two posts - one that was flagged right away as "fluff", and this one above, in which you are asking for SEO help.

I'm going to remove the domain name in the post, and hopefully, you can provide more background or statistical data. Then, maybe someone might offer some suggestions. 

No one is going to do an SEO audit of a domain for free, so hoping for that result is pointless.
I agree with you.
Are you concentrating on Off-page SEO?
I have been optimized my website & added niche content on it. 

But still my website is not ranking in top position (not even top 10). 

Tried all SEO checker tools, SEO tools showing 90+ rating. 

Could you guys suggest idea to improve the ranking.
What industry are you operating? Some industries are supper competitive and getting to the first page doesn't have a quick win / inexpensive solution.
Don't give up .try on working with SEO and SMM strategy . Be active,atleast thrice you post in social media, gradually it will increase traffic
You said social media. Does sharing in social media help link building?

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