The best longsword, according to the runescape wikia, is the chaotic longsword. The chaotic longsword is obtained via the dungeoneering activity.
It costs 200,000 tokens and if completely uncharged will cost 2 million coins or 200,000 coins and 20,000 tokens to recharge to 100%.
Longsword.
Rune Short-sword on Accurate, or Rune Longsword on Stab/Controlled. They're about equal in Attack. Rune Longsword will hit higher.
get the steel LG by attack hill giants or buying it.
probably chaotic maul or vestas longsword
I suggest a full helm, body, platelegs, gauntlets, and boots of the best metal possible with a longsword and kiteshield.
Different weapons are better against different monsters, since there are different attack types and different types of defenses, so there is no single "best" weapon. For an all-purpose weapon, many players prefer either the longsword, or the scimitar.
Dragons. Their hides go for loads of coins, expecially the Black Dragon Hides.
Well The Long Sword has better statistics but if your about speed the scmictars better.
Chaotic Longsword > Saradomin Sword > Brackish blade/Dragon Scimitar > Rune Scimitar
The rune longsword is slower, but has a higher max hit by 1, but the rune scimitar is faster but has some unnecessary bonuses and is expensive, so the rune longsword is best.
Dragon Dagger, Dragon Battle Axe, Dragon Longsword, Dragon Halberd ----------------- Mainly out of those, Dragon Dagger P++ and Dragon Battle Axe are best. EDIT. dragon claws are better.
The best melee weapons are in descending order as follows: Chaotic weapons earned through dungeoneering abyssal vine whip(high slayer requirement) abyssal whip dragon scimitar dragon longsword rune scimitar