Uhhh, metal tip bases are great bro. SG Metal Flat 2 is fantastic, and using Driger F's shaft in other bases (heck, even in its own base at tmes) produces excellent results, albeit requiring practice.
Dragoon F's base is also perfectly decent for attackers. IIRC out of the G and GT series, Dragoon GT's Turbo Left EG and the right CEW produced good results. I want to play around with Dranzer V's base in attack mode a little more, despite it's height issues.
You could, in theory, use SG Metal Change for attack, though it is at heart a balance base, it can still work very nicely.
That said, there aren't that many viable defense or stamina bases either, when you think about it.
I personally wish they had made an SG Metal Flat 2-tipped base with SP ability. Currently the closest useable thing with SP is probably what I described.
And as I said, I've been getting better results with storm grip lately, apparently grip attacker is very similar to storm grip performance wise, and sg metal flat 2 is better than most of the other bases you've listed, as is driger F's shaft in the right combo.