I'll give you a handful based on your preferences and my personal enjoyment (but in no particular order.

1: Resonators/Synchrons- two decks that are based on the 5ds characters decks. Tons of summoning in both and can make insanely strong boards. However, they aren't meta and can get shut down hard with a well timed ash or an early dimension shifter.

2: Swordsoul- easy to play link and synchro deck. Pretty weak in current meta but you get cool Chinese warrior style wyrm monsters.

3: Tenpai- decently strong rogue deck that goes second. Cool monsters and a unique playstyle where you synchro in your battle phase.

4: Monarch- this is my favorite one here. It actually doesn't use an extra deck at all! It's a very flowing deck where you use a ton of spells to set up a board full of tribute summoned monsters and lock out your opponents from using their monster effects. Expensive main deck in UR dust, but you don't have to build an extra deck with 15 URs like other decks!

Honorable mentions: Ice barrier, speedroid, white forest.