As others have said, unfortunately you need current / recent "debt".
If you have a lot of cash on hand, you shouldn't be carrying any credit card balance at all unless your interest rate is 0% or something ridiculously low. Pay in full every month. Get another card or two and do the same. Think about where you shop.
Maybe start by just getting a Target /
Best Buy / Kohl's.... wherever you are shopping anyway while you look around for a good rewards card ( Visa / MC / Am Ex / Discover ). Charge on it from time to time and pay in full.
Whenever we buy cars, we always finance at least a little or for a short period. If finance rates are 0-2%, we usually finance 100% and then our "car fund" stays fully funded for next time.
All that being said, we were denied once for a Home Depot credit card despite never having a credit score below 800 our entire marriage. I think we'd opened a HELOC when we did a refinance and it was the type that you didn't have to take any draw (so we borrowed ZERO) but the credit line was rather large (maybe 50K) in addition to most of our CCs having large available credit... so anyway, I think we were fairly young at the time and they thought we had a lot of potential opportunities to get into big trouble!
I guess I get it, but it really bothered me for some reason!