Being in a signature or having a higher-ranking account is only most times needed if the person wants to apply for a non-collateral loan. Those are a little bit convincing that the person will pay back, but it's not a guarantee; a loan defaulter will always be one.
But if the OP has valid collateral that is even higher than the requested loan amount, then the lender doesn't have anything to worry about because the collateral, if it's in any coin, will be deposited either in the lender's wallet or in an escrow account that will guarantee repayment, and if repayment is not made, then the collateral will be sold to recover the loaned amount. It's as simple as that in such a scenario, a high-ranking account or being in the signature is actually not needed to get a higher chance of getting approved.
Not sure of any coin that is not listed, however no one will accept a shitcoin as collateral. Besides if op has something like that why not he just sell it off to usdt than coming to take a loan, just as i have said earlier it will be better for op if he had a higher rank. Just take a look at me for instance, i won't accept giving a loan to an account that hardly post or have less activity over here who gain no reputation.