Wycliffe is v v sporty.
Beaudesert is a kind of old fashioned prep school …. very Enid Blyton … lashing of cake and cream & fresh air. Most parents seem to love it! It in the middle of Rodborough common which is beautiful.
Westonbirt is also lovely - another good ‘all rounder’ type school out near Tetbury.
Gloucestershire is a grammar county with a ‘super grammar’ Pates so a lot of the very top academic kids go there or to the seven other v good grammars rather than private so that does affect results of private schools.
More towny - Kings in Gloucester. Cathedral school - definitely more arts / drama etc. Good reputation and good pastoral. It’s a day school so apart from the cathedral stuff no huge weekend pressure.
The Cheltenham schools would be right on your outer limits of 30 minutes. St Edward’s - old stalwart - always in the shadow of the ‘posher’ privates but good for pastoral and maybe the less academic all rounders.
The famous ones are all boarding so sat/sundays required. The two co-eds Dean Close & Chelt college are v sporty and fairly young there academically and then Chelt ladies is for the super bright (& tough resilient ones!)
Berkhampstead is day school and v arts, music, drama but has no secondary.
There are numerous good state primary options near ciren & stroud. Rodborough, Brimscombe, Ampney Crucis, Woodchester, Powells, Uplands, - you can literally take your pick. The issue comes with stars secondaries which are all pretty dire as the grammars strip out the vast majority of brighter students. Balcarras and leckhampton are great but you have to line in their door step in cheltenham. The Cotswold school is ok though.