It is up to personal needs.
OneDrive is a bit slow performance-wise, but it has ransomware security included from the most basic plan & up. Also it supports differential sync.
Google Drive is faster but it syncs the whole files everytime, there is no differential sync (I am not sure if there is an exception with google office files such as docs or sheets).
Dropbox is great, with differential sync support, but it requires you to pay seperate addon for security.
Microsoft Office integration is best in Microsoft OneDrive as expected, but there are Office 365 addons for Dropbox too. I think there is also something for Google Drive but not that good or great for multiplatform.
As for the price, OneDrive has the most competitive pricing, granted that you also get Office 365 suite & 1TB together in great discounts.
Security wise, I don't think there is any reliable source giving you real world information except from encryption technologies used. Vulnerabilities can exist anywhere. Just secure your account with MFA, and use ransomware protection if available at your chosen solution.
I would prefer to use Dropbox but I find no actual reason to buy another extra subscription than the Office 365.