You've just missed Shelford 1, but Shelford 2 is at the end of August and is as straightforward as they come!
Other than that you'll have Eland 2, although Eland 1 was tougher than usual, horse needs to be good with steps.
Stafford would be an option, lovely course, usually maximum length, but nothing tough - it is on clay, so ground can be deep or hard.
And Frickley, which is bold course over old parkland, I love it, but the SJ is on a slope and can cause problems. Again it's on clay, so if we have some wet weather it can get muddy.