Gaps are tough to fill on a golf forum - you are talking hybrids in general - and hybrids differ, shafts differ. So in general, it's tough to get specific advice unless you offer specific information.
Personally, I like a 7 wood better than a hybrid in a 21 or lower loft. 22 is pushing it, depending on the hybrid. And it depends on what 7 wood - I've had great success with a Titleist 910f 7 wd for some reason - it's small enough and the weight feels just right for me in a lite weight Bassara shaft -- the key words being "for me." I have another 7 wood - a TM R11 Ti - that I do not hit as consistently well - I weighed them and my club maker was a little too generous with the hot melt on the R11 - even though the shafts on the two clubs are 55g - the TM weighs 12 more grams - with the added weight in the head - so until I build more muscle, I will use the Titleist.
The point being - you've got to get out there and find what works for you - we can only give decent counsel if you give specifics and even then, it's a crapshoot.