Yes, holy trinity is good, also Huish Primary. Preston primary (on Abbey Manor housing Estate) is great but it is overcrowded.
I would avoid Reckleford and St Michaels Academy.
There is also Birchfield, Milford and St Gildas - not sure about these three, I think they are ok.
Oh, also Oaklands is quite good I believe. Chilthorne Domer Primary is just outside Yeovil and I would probably go for that. in fact research the smaller primaries in the villages,might be a better experience!
Secondaries are all the same, Westfield, Preston and Buckers Mead are all in Yeovil, Preston has recently had a bad ofsted but they have a new head so it could just be bad timing.
Westfield was great for my son, he did well academically there, I think the staff were good and facilities weren't bad. Don't know much about Bucklers Mead. There is also Stanchester in Stoke just outside Yeovil which was terrible but I think has a good head who is greatly improving things.