Very possible to do the Fairfield horseshoe from different spots, I did it from the car park near Nab Cottage and despite finishing in torrential rain was a nice day out with some stunning views. It's far easier than some would make you believe and if you ascend via the most easterly ridge by the time you've hit High Pike you've done the hard bit, the rest of the day is a gentle trundle. Would try to watch the wind forecast for this one though as due to the ridge aspects they really speed up the typical south-westerlies which tend to hit this part of the world.
For other routes around Grasmere you really need to include the Helm Crag route to the W. But even if you ignore the Helm Crag ridge (why would you!) there's a short circular to Easdale Tarn, as well as Easedale Gill up and down Tarn Crag (stopping at Easdale Tarn). One of my favourite routes in the lakes is the Helm Crag to Silver How horse-shoe but it's fairly tiring on the legs, particularly if you include Steel Fell. However if you just do the Helm Crag route up it's got plenty of character, then you can choose to swoop around towards Sergeant Man/High Raise (both great view points), then either down to the tarn or sweep around to Silver How (which in my opinion is a far better route in decent than ascent due to the views being better to the west, and lets you enjoy the views to the north east as you ascend the opposite side of the valley).
P.S. Arrive early as Grasmere parking is limited and this year it's going to be full quickly.