We use Blesta, and stripe - PayPal for payments, even if you like to accept only CC payments it's a good idea to have two options for your clients because sometimes things happen.
Paypal has a higher basic rate outside of your base than a stripe, but we figured that once your gt into their merchant fees discount on payments up to 50 USD PayPal is actually cheaper than a stripe, of course, it has its drawbacks.
Stripe from the other hand is straight forward but delays your payments by at least 1 week, and it seems to have fewer drawbacks than PayPal (though stripe is fairly new and strive for market space so that might change in the future,)
Paypal integrates better with tax systems (Especially if you are incorporated in the UK) but stripe just needs a few more clicks so not a big deal.
The reason I would prefer PayPal is the option to offer Client Credit, and the Business capital + CC, though you can get all that from a bank as well, and it's not a deal-breaker.
Final conclusion is that we been operating using only Paypal since 2011, we added STRIPE as an option a few months ago in 2020 and we got surprised when we noticed 80% of our clients changed their preferred gateway to stripe.
You mention Paytr, which I never used, but if it's known in your target market audience and makes payments easy for them I don't see why not to use it as well.