Drake sword/Halbard. 138 dmg on Halbard, 200 dmg on sword, I have a Claymore +3~ with 133 dmg and 93 dmg on the tail axe.
Claymore is a good low stat weapon with a good moveset. Tail Axe just bends so it's kinda weird for me.
Drake Sword can last you until you beat the Capra Demon, but then you really should start looking into using something that scales with your stats and upgrade it. Just find something that you enjoy how it swings and you have a feel for it and take it to +10. You can find the large ember at the start of the depths after the first butcher with 2 dogs and a fire.