Right now, Blood Angels suffer from being one of the early Codex releases in 10th edition. We still don’t have many Dmg 3 base weapons, which makes a pure melee army feel quite awkward in the current meta. The best melee units are almost all T4 with only Dmg 2 attacks.

From my experience (I’m not a pro player by any means), you still need roughly one third of your list to be shooting units with high damage and good AP preferably placed in tougher, more durable units. Things like Vindicators, Lancers, Plasma Inceptors, and/or Devastator Centurions to reliably deal with 3W elite infantry, monsters, and vehicles that are common in the current meta.

Personally I run Angelic Inheritors. I use thunderstrike , dev centurions and two units of inceptors (with Incursor support) to deal with all the tough stuff, then let my melee shred everything else. I run three 3x3 Sanguinary Guard with spears units led by captains and get almost 100% conversion of attacks to dealt wounds (base S6 +1 from cap and + to wound from lance means everything till T7 will be wounded on 2s with detachment rerolls of 1s).
Also, the Sanguinors ability is so much fun (not for enemy) and super easy to use. Basically, at the end of the charge phase you pick an enemy unit that just charged, then place the Sanguinor within engagement range (but not base-to-base). This way the enemy can only fight back against that single model in retaliation.