I think the Godsword is the best weapon you could get. Each Godsword has diffrent high hits but all of them are good.
armadyl god sword for two handed weapons and abyssal whip for a single handed weapon
Dragon claws
Gravite shortbow.
In my opinion the best is a rune scimatar
vestas sword, but the best weapon is chaotic maul.
The overall best f2p Runescape weapon is actually a range weapon - Maple Longbow (sighted). It has a range bonus of over 100. The best f2p degradeable weapon is the Gravite 2h. Both are Dungeonneering weapons and need 45 Dungeonneering levels.
the best weapon in RuneScape seems to be the Chaotic Maul, having an enormous max of 686(68) recorded. You can get the Chaotic Maul by obtaining 200,000 points in the Dungeoneering skill.
In my opinion it is a mithril scimitar.
An Abyssal Whip, this weapon requires 70 Attack to wield, but this being the best one-handed weapon in Runescape also comes at a moderately-high price inside the Grand Exchange, especially to a new member.
You are best look on Rune Locus to find the answer for this question.
The adamant battle axe and adamant scimitar are.
Saradomin sword or Dragon scimitar are popular.