Did you already tried LOCOWIN?!
They have one of the greatest Bonuses for your first 5 deposits. Have a look:
Deposit 20€ or more, get 35 Freespins.
Deposit 51€ or more, get 70 Freespins.
Deposit 100€ or more, get 100 Freespins.
All Freespins are wagerfree and you can claim this Bonus up to 5 times. You can also get some extra coins with your deposits:
1st deposit: 100% Bonus up to 350€
2nd deposit: 85% Bonus up to 350€
3rd deposit: 75% Bonus up to 400€
4th deposit: 50% Bonus up to 400€
5th deposit: 100% Bonus up to 350€
Not enough? Check out the regular promotions at LOCOWIN, for example the weekly Cashback.