You've got quite a few choices, depending on the price point you can tolerate. My hands-down favorite bass line is the Pat Ehlers Bass Line by Teeny Line Company. I have one in a WF7 and its about as good an all-around bass line as I've used. Bright red on color, the line features a glow-in-the-dark tip. Very handy at night, Really, very handy, especially when you fish before dawn or after dusk. The taper is just about perfect - very radical wf with a longish rear taper that allows good casting distance and control. This line is great to about 70' or so - you can false cast 45 feet of line plus leader easily. Not a bad roll-caster in close to about 30' with the right rod. I use mine on a Garcia and on my Browning 322980. Of course a quick look at the
Teeny Professional Series web page suggests maybe this line is no more ... there's still a Pat Elhers bass design but the glow tip seems to be gone. Still, worth looking for for sure!
If you want a much less expensive line I heartily suggest either an Orvis Clearwater WF in 7 or and SA Headstart in 7. Both are very aggressive wf designed that are built to let a new caster "feel" the rod load. They are BB taper with a shorter rear taper and shorter running line at 70'. That's okay because these lines are really designed for fishing inside of 50' Roll casts of more than 25 of line (plus an additional 9' of leader) are challenging as the back taper is abrupt and you cant roll from the running line into the head. That said, these are a very sweet everyday line for under $40. I've got them in sizes from wf4 through wf9 and I've got three and four of some sizes as back-up. I must like them! Note - Orvise closed out the lines at $12 a while back. While that deal is gone, there are probably more than a few for $20 or so on Sierra Trading Post.
You can do a lot worse than a standard WF7 from Cabela's. The Prestige is a very solid performer, though not as radical in taper. Good cross over for smallmouth/heavy trout/light largemouth.
Finally, I actually have an Air Cell II WF white fly line in a measured 7wt on my Garcia 6 1/2' rod. For a decade-old department store line, I'm truly impressed. Under $20 at Meiers, Walmart or similar stores.
Joe C.